Two and a half men :) It's a comedy, very funny and interesting. The vocabulary is also quite simple, and a lot of everyday topics  are covered + it will help you understand English/American humor :D

Do you want something current or a little older? Friends and Seinfeld are good choices and popular by most English learners. Other options are: The Office, Scrubs, How I Met Your Mother, and Modern Family. All of these sitcoms have day-to-day conversations without any advanced or specific vocabulary.  

Extr@