Yes! If you want to hear some of the varieties of American English, check out 

The Sopranos (New Jersey/New York)

The Wire (Baltimore)

Yes, Seinfeld is great! 

I think It's Always Sunny in Philadelphia is also a good one.

People are always talking about the series Breaking Bad.

The series 24 was pretty suspenseful.

Also if you like mystery, maybe you would like CSI

The Office was funny as well.

I also hear good things about House of Cards.