TOS, TNG, VOY, DS9, ENT, TAS.
Yeah, TOS is corny but I'm a big fan of old sci-fi (which is mostly cheesy anyway) and the "limitations" don't make it difficult for me to watch.
In fact the original show (without the recent enhancements) had pretty good effects for television back then.
Shatner and Nimoy really make the show worth watching.
It's difficult for me to choose between Voyager and DS9.
I guess I can put up with a female captain more easily than Sisko, his kid and all that rubbish about the wormhole aliens.
And Voyager has a sexy Borg.
Although any DS9 ep's involving Klingons are cool.