Windsurfing - slight concussion, cracked/bruised ribs, damaged rotator cuff, knuckle separation, twisted ankles, etc. Riding in extreme conditions, squalls, tropical storms/hurricanes. I was a lot younger and crazier then.
Skateboarding - fractured elbow, numerous bruises, etc.
Snowboarding - fractured wrist, numerous bruises, etc.
Golf - got hit in the ass cheek with a ball. The bruise had dimple marks.
Hockey - high sticked across the eyes. Hit in ass cheek with a slap shot. The bruise had NHL on it.
Kiteboarding - knee over-extension, sprained wrist. I am a lot more cautious/conservative now that I am older - more aware of my mortality.
I prefer soft water vs. hard, and less hard objects to fall into or get hit by.