Like the title says. No limit on how many characters. Me first !! TOS: Spock, but of course the big three were king. TNG: Picard, but I always had a crush on Shelby. DS9: Woah, that's difficult. So many amazing characters, there. I'll say Garak, then Odo/Quark and Sisko/Dukat. Hell, even very minor characters could qualify. VOY: Well I didn't watch it much, so I can't say. But I do loathe Janeway with a passion. ENT: Hoshi, I guess. The character's concept was really cool; it's just a damn shame she wasn't given anything to do after the first season. You can name villains and characters from movies, etc.
Star Trek: Kirk Spock McCoy Uhura Sarek Amanda The Romulan Commander (Balance of Terror) The Next Generation: Data Ensign Ro Q Shelby Riker (after he grew the beard) Deep Space Nine: Garak Rom Leeta Odo Voyager: The Doctor Seven of Nine Enterprise: Trip Tucker Shran Soval Porthos Archer (sometimes)
Okay, I'll bite. TOS: Regular: Spock. Guest-stars: Gary Seven and Robert Lincoln. Villain: Khan and Kor (tie). TNG: Regular: Picard. Semi-regular: Ro Laren (edging out O'Brian). Villain: Q. DS9: Kira. Semi-regular: Garak. Villain: Dukat. VOY: The Doctor (edging out Seven by a nose.) Guest-star: Rain Robinson. Villain: Seska. ENT: T'Pol and Trip (tie). Semi-regular: Shran. Villain: the Mirror Universe.
TOS - Spock, Kirk TNG - Data, Riker, Q! DS9 - THE SISKO, Garak, WEYUN! VOY - The Doctor ENT - didn't watch more than a few episodes....
TOS: Kirk, Spock or McCoy, depending on the episode. I really liked Scotty, too (except in episodes where he falls in love, where he was just embarrassingly awful). TNG: Oddly (considering that, at one time, it was my favorite Trek), by the time the series ended, I had decided that none of the regular characters were people I'd really want to spend any time with. I liked Miles O'Brien pretty well; he seemed like a solid, down-to-earth kind of guy. Plus, Colm Meaney actually had quite a bit of non-geek cred from his film work. ENT: Hoshi. Based on absolutely nothing other than sheer yum factor.
By "none", do you mean you didn't watch, didn't like, or like all equally, or didn't give much thought to it ?
Sticking strictly to main cast: Bones Geordi Kira B'Elanna Trip TNG was tough. While I like the ensemble, the individual characters are all kind of meh.
It's hard to narrow it down but here goes: TOS: Probably Bones but I love them all and I don't have a very clear favorite. TNG: Riker is my top pick. And then I like everyone else EXCEPT Worf. DS9: Bashir. Definitely Bashir. Garak too. But leading by a landslide is Bashir. Did I mention I love Bashir? VOY: Tom Paris all the way. ENT: Haven't watched it enough to pick.
TOS: Spock, McCoy, Scotty TNG: Picard, Data, Ro Laren, Q DS9: Garak, Quark, Weyoun, Dukat, Martok VOY: The Doctor ENT: Malcolm/Trip, Shran
TOS: Spock TNG: Picard, Worf DS9: Kira, Odo (and of course my namesake) Voyager: no one, which is part of why I haven't watched much of it Enterprise: T'Pol, Phlox
That's a shame. DS9 built a really interesting cast of characters and story... but you have to wait for the second season for things to really get started. I gave Voyager two seasons to make something happen, and gave up on it.
TOS - Kirk, Spock, McCoy TAS - Kirk, Spock, McCoy TNG - Spock, Sarek, Scotty DS9 - Kirk, Scotty VOY - Sulu ENT - ?