Alias! It hasn't run in a few years, but I have yet to find a show to combat its awesomeness.
But as for my favorite shows that are actually on, lol, we have,
Grey's Anatomy and Desperate Housewives
My dad is a nurse so I understand how ridiculous Grey's is, but who cares! I like it and that's that.
*Fun tidbit for you guys, if you shock someone who's flat lining, you'd actually kill them. You shock them before that to save them and start cpr once they flat line. Who knew?