Well, if we're admitting to knowing about nsfw comics...
I stumbled onto Menange a 3
a while back and started reading before realising just how adult-centric it was. It's got very good characterisation, with the exception of Didi who is just annoying. I found myself incorporating aspects of Zii into a character for one of my own stories, who has the same 'gerbil on meth' personality.
I admit I didn't get past the first 200 comics, though. Was too worried someone would walk in and catch me reading it.