Story:
Let me summarize everything up to episode 9:
(first episode)
Ritsu: We're a band now - Mio: Kay. - Mugi: Excuse me, where... - Ritsu: Shut up, you're in our band now. - Mugi: Kay. - Yui: I just wanna waste my life in peace. - Ritsu: Cool, you're in the band. - Yui: Kay.
(multiple episodes)
Mio: I think we should practice. - Everybody: LOLNO! - Mio: Kay. ._.
(Sawako joins)
Sawako: I don't want to. - Ritsu: Do it or everybody will find out you like...METAL! - Sawako: PLS NO! ;_;
(multiple episodes)
Sawako: I'm gonna molest you now. - Everybody: Kay. - Mio: I think we should practice. - Everybody: LOLNO! - Mio: Kay. ._.
(Azusa joins)
Azusa: I think we should practice. - Everybody: LOLNO! - Azusa: Fuck you guys, I'm gonna quit. - Everybody: Please don't, we'll practice, we promise. - Azusa: ...okay. - Everybody: LOLNO, just kidding.
1/10
Art:
Look at Yui walking through school in episode one. That is horrible animation. It's not always that bad, everything looks fine while the show keeps being a comedy, but as soon as it tries to portray fine movements, it fails. Which is surprising, because the instrument handling looks good to me, they are not looking like they play, they actually play. But an awkward character design (they try WAY too hard to make the characters look cute) and cringeworthy movement animation make this anime unpleasant to watch.
3/10
Sound:
The music the girls play is pretty good. It's random J-pop, but it's done very well. The ending song is actually really, really good. The opening is your standard cutesy happy song, but it works for K-On. So, what's the problem? THEY NEVER FUCKING PLAY! In 9 episodes they played like, 2 or 3 times. This should be the average of an episode if the anime is about a band.
4/10
Characters:
People have talked about no character development in K-On, which I don't think is a big problem in slice of life shows. The problem are the characters themselves. They are so incredibly bland that some of them don't even qualify as characters. For example, take Mugi out of the anime. Now, what is different? If they aren't non-existant, they are annoying. Yui and Ritsu are people I would never want to get involved with in real life, yet they are supposed to be likeable. The only character that I kinda liked was Mio.
2/10
Enjoyment:
I knew that K-On could be considered boring, even people who liked it told me. But boy, was I in for a snore fest. I found myself constantly looking at the leftover playtime and groaning after realizing that I was only 5 minutes in, not 15. It wouldn't even be that bad if I could say K-On was terrible, because it wasn't. It was just...nothing. If you want an anime about music, stay away from K-On. If you wanna watch cute girls being cutesy, try it, though there are better alternatives. All you do is watching people waste time, eventually wasting YOUR time.
2/10
Overall:
2.4/10
