The Story: Seems all too common that a popular student would go for either a plain pick or someone with an unorthodox personality. I've seen this story flushed out before..., but I would have to say a highlight was episode two, where it was actually interesting and unexpected, hehe. Another episode that I enjoyed was the episode with Nagi-san and the encounter of the cats! You will have to watch for it. There are love triangles and the occasional mean girl -- there are always mean girls and gossip around the school genre.
Art: The animation was above average, but nothing extraordinary.
Characters:The characters stick out, that I enjoyed the secondary characters more than the main characters! IMO, I liked Kai-kun, Nagi and Megu-tan after she gets over an obstacle ( I will not say what, you will have to see).
Enjoyment: I did enjoy the series overall. There are some cute episodes, some comedy and the romantic scenes are not obnoxious as opposed to harem genres...
I'd say give it a try, if you want a more slow-paced, slice-of-life type of romance anime, but if you're looking for a better romance with plenty of comedy these series trump over Sukitte Ii nya yo: 1) Toradora! 2) Ouran Host Club 3) Kaichou wa Maid sama 4)Skip Beat
Also, "My Little Monster," which is what I'm currently watching, has a similar premise, but the main guy and gal characters are more memorable.