Hi, there, Sim! Well, kinda obviously, the classic is my favorite. Always was, and always will be, although DS-9 runs a close second. Least favorite is everything but the fourth season of Enterprise. If the other seasons had been run by Manny Coto, it's possible that I might be naming TNG as my least favorite. Never could warm up to that bulky, squatty, big-headed luxury liner in space.... No offense to the TNG-ers out there.... I'd just just rather watch the classic, DS-9, Voyager, and the fourth season of Enterprise when I've got Star Trek on the brain.
Ah, Sehlat Vie! The only part of Enterprise-D that I adore!