Commander Cliff Allister McLane...that's not fair though because he's from the best sci fi show ever that nobody outside of Germany will probably know, Space Patrol Orion.
Personally, I have a hard time deciding but I always watched more of the Next Generation series. I have a hard time directly comparing the captains, it's like two U-Boat movies, one with Diesel engines and the thrill of exploration, everything is patched together and works on sweat and cursing. The Next Generation is a nuclear sub, comfortable, clean and sophisticated, more of a peacekeeping job for the crew. Both Captains were perfect for their respective commands.
Kirk is the brash, adventurous type who'd lead all away teams, get into fights, lose his shirt and get all the alien babes, Picard is the always comprimising, smooth, intelligent and charismatic diplomat. Makes me a little angry how the movies tried to turn him into John McLane (Die Hard).
It's a tough choice. I guess Picard is my choice because Patrick Steward is just that amazing. There's no disrespect for the very entertaining and talented Shatner intended.