I voted for Benjamin Lafayette Sisko, because...well...
because he's The Sisko! 'Nuff said, right?
I actually came
this close to casting a sympathy vote for Harriman, just because I
knew that he'd put in a pitiful showing based on what we've seen of him in
Generations...

...but then I came to my senses and voted for my
actual favorite.
BTW, here are my favorite captains, in order:
1. Benjamin Sisko (
Deep Space Nine) - Soldier, husband, father. religious icon, baseball fan...The closest thing to an Everyman among the Starfleet captains we've seen (that whole religious icon thing notwithstanding, of course!)
2. James T. Kirk (
The Original Series) - The passionate soldier, warrior and lover with the thoughtful, cerebral side.
3. Jean-Luc Picard (
The Next Generation) - The intellectual, diplomat and scholar with an oft-underestimated tough, visceral side! Certainly not one to be underestimated...
4. Kathryn Janeway (
Voyager) - Her occasional moodiness and tendency to play fast and loose with rules and regulations aside, she deserves credit for commanding her starship under such adverse circumstances so far from home and for pulling the Starfleet and Maquis factions into a cohesive, functioning unit.
5. Rachel Garrett (
TNG: Yesterday's Enterprise) - Just for having the sheer nerve to take the
Enterprise-C back through the temporal rift and into a losing battle with the Romulans. Never mind that she didn't actually make it that far...
6. Jonathan Archer (
Enterprise) - Just because he's in last place doesn't mean I dislike the guy, it's just that he never really made that much of an impact on me and never really stood out in any kind of exceptional way.