I measure success in experience/understanding. I don't often get kills because I'm still learning how to fly and fight at the same time. Fun and Success are two different things, though both are satisfying... If I get a kill, or even two, I'm stoked. However, if I get shot down and my opponent sends an <S> and/or "GF, you almost had me there." I consider it a success just to learn a little bit more each time. Getting kills is fun, and makes me feel good, but learning to consistently get kills is probably better.
I imagine that if/when I get past the learning curve, I will enjoy killing and talking Sheeeit.