If I had to pick the one I look forward to the most on a weekly basis, it'd have to be Person of Interest. Brilliant show.

These are the shows I watch on a weekly basis (I don't watch HIMYM anymore though, it blows)
When I feel like going to the zoo, I watch the jersey shore
As far as shows that have ended, my favorites are:
Entourage (ending fucking sucked), Friday Night Lights (best drama I've seen on tv) , The Unit (beast of a show), 24, Lost, Star Trek The Next Generation, Star Trek Enterprise, Star Trek Deep Space 9, Star Trek Voyager.