Well, I ever had a crush on a movie character, it was this guy:
http://www.geocities.com/Area51/Dimension/8722/kai.jpg
Michael McManus is the actor, a clip from a show I would rather not mention since people who watched it usually hate it and hate me along the way, too.
Apart from that...? Oh, I don't know. I usually pay attention the character, rather than the actor. An actor could be good in one movie and pretty boring in another. But if I really had to choose, it would be Jude Law:
http://www.smh.com.au/ffximage/2005/..._430x293,1.jpg
Particulary for Gattaca and eXistenZ, and there was some other movie, anyway, this guy is always good.