For me it is R2-D2. I HAVE to get every R2-D2 figure that comes out, I just LOVE Artoo! Every R2 figure looks good to me, in fact I don't think you can make a bad R2. I also get most everything else with R2-D2 on it, from Artoo socks, to an Artoo blanket, Artoo clock, Artoo radio, Artoo picture frame, Artoo pepsi cooler etc. Second to R2 I would say Stormtroopers, you can never have enough stormies.