If you watched the first season and liked it, the second season is a good supplement; i.e., it's not its own season, really. It may answer questions you might have had from the first season (John Smith, filming issues). No "airing order" crap, but you only get 7 (9?) new episodes. You should watch it if you plan on watching the Haruhi movie, which is pretty good.

Kill la Kill is very over the top, definitely entertaining, like TTGL. If you've heard people having issues with "fanservice" then you can safely ignore them as they probably have not watched the show. I never viewed any of the characters as sexual objects because I was so focused on trying to figure out what the hell I just watched.

On the other hand, don't think too much while watching this. Literary analysis about this show revolves around female identity issues as a result of puberty. Yeah.