I notice at some forums, the majority of the members will prefer one AV product over another. At this forum, it seems to be a mixed bag everytime this question comes up.
I use Norton but if you're looking for an alternative, PCCillan would be my next choice. There's no way I would consider using McAfee as I've heard too many bad user experiences with it. Particularly the fact that it often misses viruses, and their updates are not as quick as Norton and some others. But if it works fer ya, use it.