I prefer a control stick, personally. I don't know why, since either stick or yoke do the job just as effectively, but I still prefer a floor-mounted control stick!
Actually I think its more of a sentimental thing, because all of the most evocative aircraft (Spitfire, Hurricane, Tiger Moth, etc) were controlled by a control stick. Yokes have more of an 'airliner' feel to them.
Am yet to try a side-stick in a real aircraft, but already biased against them. They save space in the cockpit, I suppose, but they just don't feel right. The new panel-mounted control stick featured in the New Cessna Skycatcher looks weird, but it would be interesting to try it.