Who's into tournaments? Who's not? what are your favorite tournament techniques? How does your federation score different kicks, jump kicks etc? We have 4 corner judges and and a one in the ring. Contact has been reduced a lot in recent years. We score 1 point for kicks to the front of the body above waist height, 2 points for a jump kick (both feet off the ground), 1 point perfectly executed reverse punch pull back and Ki-hup, 2 points for perfect block and counter. All moves need to be accompanied with a Ki-hup or no points.
I compete in quite a few tournaments actually. This is the league I usually compete in:
http://www.flma.com We score 2 points for kicking techniques, and 1 point for hand techniques. Obviously the techniques must hit a qualified target. I compete in point sparring, continuous sparring (WAKO rules), empty hand kata, weapons kata, and (if I can get my kids to do it) synchronized kata. I was the points leader in all my divisions for the last 3 years.

Not that I didn't get 2nd place or even a 3rd place from time to time, but I DID win more often than not.

What can I say, my instructor was REALLY good and I have a pretty competitive spirit.
As for my favorite technique, the three I like the most in sparring are a couple combo's.
1st one: jab, then left hook kick to the back of the head.
2nd one: Right front kick to the belt, then using the same leg, rechamber and round kick to the head.
3rd one: raise the front leg and fake a kick, then left jab at the face
Those are just a few...but I change it up from time to time, and you never know which side I'll use.