Antivirus Software

Using no antivurs at all and i had no big viruses in the last 5 years.
But i know many different types of viruses and how they work, where they hide most times i can delete them myself so i won't need a antivirus.
I had some little malware very often but its very easy to remove.
I woudn't use an antivirus at all because it takes a lot of cpu usage, and it won't protect you from the real big viruses, the big ones know where to hide in your system, they will recreate them self all the time...
And you can only remove those viruses when using an linux os or live dvd to access the hard drive and deleting the virus files.