I cannot vote for some reason..But...
I used to be a kaspersky or Norton user until I moved to a new IT company that used ESET and since then I can say I have been highly impressed. Nod32 AV is pretty light and powerful, although the security sweet is abit too heavy for my liking.
But if Icouldnt pick ESET then it would have to be kaspersky, It has a great record and is nice and user friendly.