Driver for me as well. It's actually become the best club in my bag longer than an 8 iron. I'm obviously more accurate with a 7 iron, but my driver also goes 135 more yards and does a lot more for me.
And to all you short game disciples out there- here's an excerpt from the latest Golf Digest. Lee Trevino beat Nicklaus in a playoff at the U.S. Open at Merion in 1976(?), I think, because Jack made some poor pitch shots in the playoff. Lee said "Jack was never a good bunker player, and he had poor touch around the greens." Years later, Lee asked Jack why he never made more effort to be better with his wedges. Jack's reply (and I can see Jack saying it just like this): "I didn;t need to be. I just hit it in the fairway, then I hit it on the green." That about sums it up.