Jack Nicholson

Basically i am not what you would call "in love" with the performance of an actor or an actress in specific, but a person i admire a lot for his versatility and the way he can play weird and eccentric rolls, is Jack Nicholson.

The way he gets into a roll is so typical of him that you can rarely imagine another more appropriate. What i mean by this is that when he plays a roll, he gives him a very characteristic and strong personality that another actor could hardly put on.

I also think that he has the physical characteristics (the very very weird smile, cheeky eyes and badass attitude) so typical of him and that go very well with the dark-humor characters he plays.

Another important thing is that he has had the fortune of having played important and significant rolls in blockbusters; so some of the rolls he has played, had become unforgettable: The Shinning, As good as it Gets, The witches of Eastwick, etc. 

Like I said before, i don't really "love" his performances, but i think he does a pretty good job; because every now and then he plays a roll that is planned to be annoying (specifically talking about The Anger Management movie), he really gets into me and makes me hate him a lot, and when that happens it means he has made a good job... even if it means he has to make the audience hate him.