Recommendations

If you liked Bakuen Campus Guardress add

...then you might like Needless add

Same style of fighting, announcing their special moves before pulling them off, etc

If you liked Nausicaa of the Valley of the Wind add

...then you might like Princess Mononoke add

both are made by Hayao Miyazaki and are anti war and environmental movies.

If you liked 1/2 Prince add

...then you might like The Change! add

One is about the future, the other about the past, but the two female leads are very similar - strong, fearless and energetic and they both pretend to be men. Plus both series are funny and refreshingly different

If you liked Boogiepop Phantom add

...then you might like Ergo Proxy add

I think the feeling in both is the same, though the plots are not related anyhow. But both of the animes are surrealistic and dark somewhat.

If you liked Casshern Sins add

...then you might like Ergo Proxy add

Both series play in a very apocalyptic world and have male protagonists who can't remember their past.

If you liked Rabuyan add

...then you might like Oretama add

GUT BURSTING, LAUGH OUT LOUD HILARIOUSLY FUNNY.

If you liked Eyeshield 21 add

...then you might like Whistle! add

both are sports, one soccer the other american football. both have a person with real talent who better themselves through hard work. both have teamplay

If you liked History's Strongest Disciple Kenichi add

...then you might like Change 123 add

Two very similar mangas, whom both share lots of elements; martial arts, ecchi, love,comedy, drama, masters, and a love interest for our hero who can beat him five kinds of silly. To sum it up; Change 123 is the more mature, adult version of Kenichi and by far superior.

If you liked Blood+ add

...then you might like Elfen Lied add

The main character in both of these animes are Female. Both of which are extremely violent and gory. In other words, at one point of their lives they could be considered 'killing machines' for their actions.

Both also have a double sided personality. The one that people adore and the other, which is blood craving.

Anyhow- there's a lot of action and fighting scenes! There's also a bit of romance here and there. If you liked Blood Plus, you're almost guaranteed to enjoy watching Elfen Lied.

If you liked Rozen Maiden add

...then you might like Gekkou no Carnevale add

Both involve living dolls (obviously in form of beautiful girls).
Carnevale also has vampires, and some ecchi content.

If you liked Death Note add

...then you might like Code Geass - Hangyaku no Lelouch add

[Similarities]

1) The main character are protagonists bent on changing the world.

2) Both are assoicated perhaps with a bit of politics or businesses.

3) There are limitations and rules of the two tools used in both this anime (deathnote and Geass)

4) The personality and the intentions of the two main characters, Lelouch and Light, are similar.

5) Rating wise, the Code Geass story plot, enjoyment, and suspense equals that of Death note

6) The characters had possession over supernatural devices.

If you liked School Rumble add

...then you might like Full Metal Panic? Fumoffu add

The 2nd series of Full Metal Panic & all the seasons of School Rumble are both hilarious school comedies with a nice cast of characters, and they don't lose their humour even after many re-watchings.

If you liked Nyan Koi! add

...then you might like Natsume Yuujinchou add

Both main characters are aiding something, both anime have that nice comforting feeling

If you liked Ranma ½ add

...then you might like InuYasha add

The characters, story and art are very similar. What else do you expect if it's made by the same creators? Though the genre is not exactly the same thing. They added action (Not matrial arts, but fighting most of the time monsters) and adventure to InuYasha, so Ranma 1/2 has more comedy. Ranma 1/2 is also older, they maked InuYasha after Ranma 1/2. So the art looks very similar, but InuYasha's art is better.

There are some characters with almost excatly the same personality..
Akane Tendo - Kagome Higurashi
Ranma Saotome - InuYasha
Ryoga Hibiki - Koga
Cologne - Kaede

and probably more.. InuYasha and Kagome's relationship is almost the same as Ranma's relationship with Akane.. It gives me the same feeling.
If you liked Ranma 1/2 I strongly recommend you to watch InuYasha.
If you you watched InuYasha you might think Ranma 1/2 sucks because its old. Thats what I thought before watching it, and now Im really glad Ive tryed this series.
Im sure you'll like it ^^

If you liked Uragiri wa Boku no Namae wo Shitteiru add

...then you might like L'alleluja des Anges add

Young, pretty guys are somehow linked to a "special" woman and gain a protector that was attached to this other person. Cue emotional baggage about the past and current relationships. Mild BL/fantasy elements.

If you liked Steel Angel Kurumi S2 add

...then you might like Girls Bravo: Second Season add

Both funny alien who calls the the human master

If you liked High School Girls add

...then you might like Mel Kano add

from the same author, Mel Kano shows the most normal situations in the funniest way. This manga is about couples, in fact online-couples, a very contemporary topic.

If you liked La Corda D'Oro ~primo passo~ add

...then you might like Yumeiro Patissiere add

maybe the plot is different but this two animes share somethings in common : Female main character with standard abilities surrounded by professional & handsome male group who help her to be better + the fairy thing + school contests

If you liked Chi's Sweet Home add

...then you might like Dark Side Cat add

Dark Side Cat and Chi's Sweet Home are both about cats and are shorts.

If you liked Happy Happy Clover add

...then you might like Hamtaro add

Both Happy Happy Clover and Hamtaro are about cute and furry animals and there adventures.

If you liked Pucca Funny Love add

...then you might like There she is!! add

Pucca and There she is both are cute, although there may not be any ninjas in there she is but they both have the cute little girl (or rabbit) chasing after the one they love.

If you liked After School Nightmare add

...then you might like Hatsukanezumi no Jikan add

After School Nightmare and Hatsukanezumi no Jikan both are both mystery and dramas that involve a dark secrets in there schools.

If you liked Detroit Metal City add

...then you might like Cromartie High School add

As you wacth one, you will remember the other. The humor on both is so similar. You will catch your self laughing out loud with DMC if you lol'd with Cormartie, and vice-versa. I would'nt say that they both have equal art style, but surely, they both distinguish from generic look.

If you liked Full Moon wo Sagashite add

...then you might like Ginban Kaleidoscope add

The main characters both want to achieve a big goal that takes more then just words said alone to accomplish. Mitsuki, 14 year-old with a beautiful voice, wants to become a singer and Tazusa, skilled figure skater, wants to qualify in the olympics.

At the same time they both have a relationship with someone who isn't real (or once was). Mitsuki has her Shinigami and Tazusa has Pete Pumps.

If you liked Hamtaro add

...then you might like There she is!! add

Hamtaro and There she is!! are both cute with a sweet story.