I don't have any AV either. I just always make a weekly scan with Advanced System Care, though it didn't find any problems nor viruses. If you have a sufficient knowledge on how to navigate on the internetS, how to use a computer, and how to recognize a file type, you don't need an AV.
But years ago I was used to have Kaspersky, a very nice AV and Internet Security imho (for the skeptic ones).
@Rimrook: You're a pussy. But I still love you. <3