I'm up to 10.
Bossk, Han Stormie, Luke Stormie, biker scout, stormtrooper, vader, gammorean guard, 3p0, yoda, and regular han. Other then bossk and the gammorean, I've tried to stick with imperials and classic versions of the main characters (looking forward to chewie). I've been tempted by x-wing luke, but think I'll wait to see if they ever do a tatooine or jedi version. That boussh is really nice too, but that would take me down a dangerous road.
Tops on my GG wish list is a tie-pilot.