ENT: Reed, but I could have done without all the Section 31 crap.
TNG: Picard, but only due to Stewart's work
DS9: I was never drawn to one of them, but I did buy a Kira lifesize cutout once at a con when a Jadzia was unavailable. I preferred Kira in her short haircut.
JJTrek: Have only seen ST2009, so McCoy.