This may sound strange but I'd go for the BAC 167 Strikemaster. I've flown one a couple of times and for what it is it's great. Lots of power, excellent visibility, super simple systems, and very easy to fly. The problem with many high performance and multi engine aircraft is that the pilot becomes a systems manager, monitoring engine stats, fuel, navigation, etc. Not much time left for flying or having fun.
Second is MiG-17 just because I hope to get mine flying ......someday
Third is AD-5 Skyraider 18 cylinders, 15 hard points, 4 20mm cannons, how could one not like this! My father was a Navy fighter pilot and flew these (along with other aircraft) and said it was the most fun he ever had.
I suppose (in the end) I like anything that burns dinosaurs at an alarming rate, goes fast, and upsets my neighbors.