My favs change all the time, but at the moment my favourite plane to fly is (don't laugh) the Po-2. That thing can land anywhere, take off from stand still in about 5 metres and turn like a fly. It can hang in the air almost stationary without stalling, me and Star Foz even took it up to over 20,000ft (God knows how the pilot and gunner were still breathing).
Yes its oh so slow, but take it right down low in the streets of berlin flying 100mph, twisting between the buildings,the feeling is awesome. nothing else can do that.
Of course I wouldn't take it anywhere near a dogfight. Thats what my Hurricane is for