[quote=@Bishop]
Kakashi resorted to copying because he didn't have the necessary mana to use sharing an to its full potential. That or he just liked to troll. Notice that he never used genjutsu, if rarely and 1 kamui left him dead in his tracks. So basically he used the most basic skill, the one where you see through the others JUTSU, maybe even the time slowing one.

Even Sasuke could copy others. (from his fight with Lee) where he picked his moves only by seeing him once. And if you have a lot of chakra nature's(3 in kakashi's case) and basic level of sharingan anyone could copy. But most other have their own style which they deem to be better than resorting to copying.

This is purely my opinion based on real facts.
[/quote]

I mean, except Kakashi uses hella genjutsu. And he's got all five basic chakra natures. 

And Kakashi was a jounin at 12. He doesn't set the bar particularly low. The copying aspect of the sharingan is completely nullified by the rules of the RP, though. Since a genin with the Sharingan are not allowed to copy every technique they see.