Different classes, and different reasons.
L-1011-500; because it was the best all-round flying aircraft.
L-188C: perfectly balanced controls, tons of power.
DC-6B: because that was what made me a professional pilot.
Beech D-18S: because that made me into a pilot.
Auster Aiglet (like a Cub, but with inline engine); cos that's what I soloed on.