Player development IMO. My son has grown from a "B Player" in his younger years to a vital member of an upper level team. However, that would not have been possible if he did not get the proper coaching at the club and high school levels (there really is no drop off for this area and we are lucky in that regard).
Also, to enjoy the experience (especially at his age group now) a fundamental measure is winning! I wasn't as worried about this aspect when he was 10, 11, or 12 years old, but once you reach that middle/high school stage, it's all about what's on the scoreboard (and player development has as much to do with that measure as anything)!
