Maybe X-2, honestly.
Yeah, there have been other great experiences (I've played, in various incarnations, I-V, VII, VIII, X, X-2, D/DFF, CC(7), EoT, MQ, and some VI, XI, XII, DoC(7), CC, EoT, with all the former but III and MQ to the credits (okay, I was at the final battles in VII)), but I...