I agree with James and Dave, but I don't always practice what I preach. Our band has a regular gig at a club where there's a Yamaha Grand. It's not always perfectly in tune and the action's a little stodgy. Sometimes I prefer to play electric so that I can readily add in EP or organ sounds (the acoustic is tucked in a corner with no space around it for other boards), and because its "easier." However, feedback from the audience indicates that they love it when I play acoustic; from their perspective it just sounds fuller and richer than any of my DPs.
When I play the Yamaha I tuck a condenser mic inside. Even so, if the other guys play too loud it can be difficult to hear myself, and I have to be conscious of not pounding the keys.
We've a gig coming up there in a couple of weeks and with our guitarist absent due to an injury, the bass player has suggested he play upright and I play the grand. It makes sense to do the show that way as it will sound more intimate - and we've recently added a bunch of jazz standards to our set list. Because I don't have an acoustic at home for practice, I have to fight the urge to stick with the familiar. But I know that I should take every opportunity to play "the real thing" when I can, and that, despite its shortcomings, it's still a way more expressive instrument than anything I own.
Good luck with the college gig, jazzonebyone!