I got bored man. Usagi Drop was cute and all that, but I couldn't do it anymore after a few episodes. Same with Space Bros. I think we got to episode 6 or 7, how much longer are you gonna keep testing for! Penguindrum was awesome at the start, but it kept raising too many questions without giving any answers. It was a little frustrating. Jinrui was cool - funny. No reason to drop it, except that I started watching Tsuritama (which I also dropped).
Shows like Steins;Gate and Baccano were absolutely thrilling and enganging from start to finish, so I guess I don't really know how to pick them. I loved Sakamichi no Apollon, but that show had amazing pacing - and I'd probably say it was more of a drama than it was slice of life.
I also suffered through such trials as Tiger & Bunny - which I managed to finish on behalf of losing a part of my soul. I dunno... Anime is awesome, I love it... but sometimes it hurts, and I ask myself 'why?'. I guess I just have specific tastes, that I don't even fully understand - and there are too many shows - a lot of them sound promising, and I turn out disliking them. Some of them don't seem like much, and end up being fantastic, and rewarding.