Season 2 is ok. It's just that Season 1 is fantastic. Season 2 is supposed to be a bit more fan-servicey, but there wasn't much more fan service, or at least from what I've noticed.
A new kid moves next door, and he's a noticable speed bump to the show whenever he's on screen. There's a lot less Hosoka, which is incredibly sad. There's not a better story or a more serious tone in the second season, it's just executed poorly.
Season 1 had me nearly falling off of my chair at times because I was laughing so much. Season 2 made me giggle occasionally, but nothing more.