thinktank wrote:80 bazillion votes for offensive skills, 8 for defense.
Tells you all you need to know about what people know about defense. Nothing.
I think a better response would have been for you to suggest what the defensive skill that's super difficult to learn is, unless you previously did, and in which case, I'm sorry, but I missed it. The thing about defense is that a lot of it is IQ related in terms of being a good defender. A good amount of it can be natural or also learned (stealing and shot blocking), and a good amount is effort (not taking plays off, fighting through screens, making sure to box out, not doing lazy rotations or shot contests). There are good shot blockers who aren't the smartest players but naturally have good timing and anticipation, similarly good ball thiefs with the same situation.
There are sucky shot blockers who later become good after learning proper rotation and shot block timing, ie. Andrew Bogut, but you don't see that too often, and the guy usually has to have the length and quickness already.
Not too many guys work on stealing ability (I don't thnk they do), but being able to anticipate passes and get in passing lanes can be worked on in a sense. It is actually something I personally didn't "work on" persay, but decided to think about more and got better at it. And then being quick and having quick hands helps in that too, and reaction time is also a natural ability.
Learning how to not foul is also a skill, but is more about discipline with hands and body in addition to better rotation and feet movement than it is about learning the "no fouling" skill. And even with the later, if you're undisciplined, you will still pick up fouls.
Defense just has a lot more understanding as opposed to physical skills. On offense, you're doing all the similar defensive things (know where to be, how to spread the floor well, discipline with shot selection, how to use screens, how to set effective screens, how to anticipate plays, footwork etc), but then you also have to shoot, dribble, pass, post up etc. On defense there's no extra added dimension of maneuvering a ball around.