The Followers.
Generic good people that actually struggles because they are after all, a bunch of good people.
I just wise I can actually start my own Vegas faction, or leading whoever was in Vegas instead of just "Yesman" faction.....
Same here - they're almost "too good", in that there's basically no moral ambiguity about working with them. Though I guess their general goodness prevents them from being as powerful as the others, which is in a way its own kind of dilemma.
A close second for me would be the Kings - there's just something about a gang of Elvis impersonators that strikes me as incredibly awesome. Plus, they seem to be good enough people, which is nice.