The arch on the hands is pretty nice, especially on the one holding the ball. Woo Ho! It works! ~Neya
I like the style of this one better because it is more stylistic and interesting. It isn't just a person but it has some shape and movement. The hands are a little off, especially in the thumbs, but much better over all. I think that it would help (as you suggested) to practice the individual elements over and over again, just get the feel for what a hand means. They are pretty good over all though. I was expecting a lot more sketchy based on your original comments.