I've finished Bokurano. Incredibly good, I highly recommend it. (Is there anything I've mentioned in this thread that I have not recommended?)
Kinda depressing, though.
I'm kinda like that too. Most things I stick through with are always something I could probably recommend. Otherwise I'm just torturing myself and there's no point. If you read two volumes of a series and it's not good, why would you even bother continuing and just being pissed off? I can only see if you're just curious in what choices the author makes next to blow your mind but that still means you're curious and interested in the series. If you keep going because "it might get better" then I'm not sure what to say. I think "it might be better" if you start a different series that is actually good.
Also wow, you read Bokurano fast. Eleven volumes isn't something I can read in one day.