What's your favourite Transformer sub-group?

(A subgroup, in case you don't know, is a bunch of Autobots/Decepticons in their own little division, e.g. Constructicons)

I think mine would be the Dinobots. Aside from the fact that I really like dinosaurs, I like how they're characterised as being, essentially, Autobot beserkers who generally do their own thing and are only Autobots because a) they started out as Autobots and b) they dislike Megatron more than Optimus Prime.

I like their G1 comic incarnations better than the cartoon versions (who went from being 'dumb but strong' to being simply dumb in season 3), and I think Animated's Dinobots, while pretty cool, didn't live up to their potential as much as they could have done since they became pets for whoever showed up on Dinobot Island.