Granted, I haven't played him much, but I don't know what the hell I'm supposed to do with him, and I kinda want to learn him because he's cool and who his VA is. That, and you can be really flashy with him lol.
Rule #1 of Resident Evil: Don't catch the sunglasses. GT - Judgement Blade
I see no point in that pic, but needless to say I like it.
On topic, Lee Sin can be used as a Top, Jungle and Mid lane champ. He has a very powerful early game and a good late game. Build him like a bruiser, BC/BT and the like and max R>Q>W>E. He has a nice engage move and a great escape attack, but mastering him can be a bit difficult, but he is very much worth it.
Edit: If you want to watch Lee Sin in action, Wingsofdeathx is currently playing him on his stream on twitch.tv
you hshould be using ur ult wheneer its up because its always on a low CD and you'll confuse the enemy and when he is confuse you can kill him
No, you shouldn't use your ult every time it's up, you should use it as much as possible, just not when it's always ready to be used. It is a useful move for many reasons but just blatantly using it when it's ready is wrong. Save it for when you need it, not just to "Confuse the enemy" because you can.