Dexter. Once you get past the psychotic shit he does, it's a very good show. Humor is very unique as well (akin to that of the Office).

The Office. Both the American Version and English version are funny.

And even though Lost has been mentioned, I wish to forewarn you. It will probably be the longest tv series you ever watch. It's very very good, but it will waste hours of your day as you watch the next episode after numerous cliffhangers.