Tennis is fun. I have never gotten any lessons so my form is horrible but I like playing. I can't even serve "properly."
Playing tennis hurts my elbow, wrist, and thumb. I actually wear a batting glove on my hand when I play tennis cuz otherwise I get blisters on my thumb. It looks kinda retarded but hey I am blister-free. I got a nasty sunburn on my upper back this weekend from playing in the sun too. Wore a tanktop and failed to reach low enough when applying sunblock to my neck/upper back area.