Skill
I have spent most of my life as a weekend sport flyer, and have competed very little. (This was mostly due to the fact that I travelled full-time, and couldn't carry everything around with me.)
Anyway, this year a buddy of mine and I have been going out to the club field every weekend and having a great time. I was just starting to think, "Hey, I'm pretty good."
...Then last weekend there was a IMAC/Pattern contest, and now I (again) know the truth. Truly inspiring. (I need more practice!)