Great Divide's Yeti is my personal favorite; it's in the Russian Imperial genre.
I like my stouts strong, with layered chocolaty roast flavors, smooth almost chewy mouthfeel, and loads of hoppiness. Vanilla and coffee flavors go well with it, too.
I could be happy with a stout that didn't have ANY roast barley -blasphemy here, I know.
-Basically, I like my stouts to be super-sized robust porters and ideally aged on oak to get the vanilla notes and to take the edge off of the high ABV.
Adam