Yeah, I've seen pretty much every dunk contest, they show a bunch of them every year around all star weekend.
My favorite dunk contest performance would have to be 2000 by VC. That was just sick. The showmanship was epic, and he did it without gimmicks. The gimmicks bug me. I prefer a sick dunk with no costume, no props, etc. The modern dunk contests are too gimmicky for me, I most certainly prefer the older ones.
That being said, I still believe the cupcake dunk by Gerald Green is madly underrated. Sickest ****ing gimmick dunk right there.