Legs. You can travel with artificial legs/a wheelchair and it's not that bad. Doesn't really work that way with arms. I couldn't live without them..... I'm on the computer all the time. No computer... no phone.. no games, couldn't do my job... live would be **** Would rather be deaf.
As I'm legless at least half of the time, I think this would be easier to cope with. Given the choice however I'd rather keep all appendages.
Rather keep all my limbs thank you very much. Especially when you see all those extraordinarily brave soldiers who have lost 3 or sometimes all their limbs. In the future though we'll be able to regrow limbs. Joints, tendons, ligaments are already just around the corner.