Love all Spitfires, all P-47s, all Hurricanes, Typhoon, Tempest (although I've never flown it in MA), both Yaks, F6F, both B-25s, B-17, B-24, C-47, A-20, P-40, SBD, TBM, Mosquito (and sort of Bf-110, but the Mosquito's more fun)
Hate most of the planes I haven't mentioned above (but not all). In particular, the Japanese planes, and the La-7 (well, it's ok, but I like the Yak way more)