They are all important.
The most important thing about basketball though is your attitude. If you ahve a shitty attitude you game will never be all that. When i say attitude i mean attitude towards the game eg: how willing you are to learn and take on what your coaches say and your attitude towards other players both on your team and your opponents. If you can't respect a player for what they are good at you will never be good yourself and as far as i'm concerned shouldn't even be allowed to play.
Ya feel me.