Great anime. The characters are pretty defined and they all have their own story and distinct personality. I loved the jokes, the artstyle, the fanservice without it being too much or too obvious, good stuff.
One thing to get off my chest though, I'm really tired of the whole *girl mumbles something* *guy asks what she said 'what was that? what did you say?'* *girl says 'nothing, never mind!'* bit. Especially in this second season, the girls always say stuff that clearly show their interest in Kodaka, and he NEVER hears their mumbling and they always make up excuses as soon as they realize he didn't hear them.
It's fine once or twice, but this happened all the freaking time. As usual, the guy is completely and utterly oblivious to the advances of the girls. I guess the bit before a relationship is always more interesting, and the plot of the show is making friends, but it got a little annoying in the end.
Regardless, this show was hilarious almost all the time, loved it!