There's definitely a healthy Troy/Abed contingent out there. It's never explicit, or a running gag, the way Raj and Howard are (Community is far too dignified and politically self-aware to frame its protagonists in that kind of crude, slightly degrading humor, I think) but it's a thing.

One of the interesting things about them is that i've heard people actually shy away from slashing them, even though they're so eminently slashable - because they've got such a vibrant, healthy, honest, interesting friendship and that's kind of rare to see between two men on tv in itself.