Christian Bale. I've seen everything he's done, from Empire of the Sun to that weird Chinese movie he did.
I am the same way except for in a few cases where I really like the actor. I also like watching random obscure movies and getting surprised that someone well known is in them because usually they do their best work with the underground type movies.I personally would not watch a movie just because my favorite actor is in it. Besides, I usually don't find out until I'm actually watching the movie anyways. My favorite actor is Paul Walker...R.I.P. Excluding the Fast and Furious series, there have been movies that I've watched out of boredom that I didn't know he starred in.
I recently just saw a movie of his that was kind of bad but because he's in it it became watchable. He brings a lot more to the table than just his acting skills, he is very charismatic and entertaining.Denzel Washington is by-far my favorite actor. I have seen every single movie he's been in, and he never seems to disappoint! He may go down as one of the best actors ever.
I don't really think I have a favourite actor, but I did say today I'd watch pretty much anything Tom Hardy was in.