Hitter: Manny Ramirez <-- love the story that he'd purposefully swing wildly at a pitch to bait the pitcher into throwing it again... then he'd crush it.
Pitcher: Greg Maddux / Pedro. Basically you could write down an L when you saw these guys on the schedule.
Fielder: Omar Vizquel <-- the turn-around-back-to-the-ball pop fly catch was one of the most surprising / fun fielding techniques I've ever seen.
All Around: Kenny Lofton <-- pure excitement. Every option was on the table when he was at the plate, no ball was out of his range in the field. And on the base paths... Game 6, ALCS, Randy Johnson, wild pitch... scores from 2nd. My favorite baseball memory.