I think it's easier to mention favourite films, than favourite actors, because there are a lot of films that I love, but I'm not a huge follower of the actors that are in them.
But if I were to name a few, then they would be:
Christian Bale. ( His acting has been brilliant in his earlier films, but mediocre in newer ones like Batman and Terminator, where the script doesn't really allow for him to run the gamut of emotions - which is what he's so good at).
Gerard Butler. (I've been watching him closely since starring in Attila, and his acting has got better with each film (amazing what an ego boost can do for many actors!), and am now liking a lot of what he does).
Mickey Rooney. (Living legend. Enough said!)
Charlton Heston. (Another legend)
Michael J Fox.
Brad Pitt.
Sylvester Stallone.
Oliver Reed (RIP)
James D'Arcy (Showing great promise - a real natural)
Edward Norton. (American History X)
Clint Eastwood.
Alan Rickman (Awesome in Robin Hood and Sweeney Todd)
Kevin Costner (Love Dances With Wolves, Open Range, Waterworld and the Postman).
Sam Worthington. ( This guy is going places, not just because of Avatar. His acting is believable, and makes the Hollywood heavyweights look like amateurs).
Russell Crowe (Excellent in Master and Commander, and Gladiator. His acting is excellent, when the script allows for it).
Schwarzenegger. (as a movie star, not an actor).
Sydney Poitier. (Guess Who's Coming To Dinner, To Sir With Love).
There's plenty more, I just can't think of them right now. Especially actors from TV shows going way back.