On my home machines, I made a switch to AVG about a year ago, due to the simplicity of the GUI, hands off updates and "set it and forget it" beauty. I had access to free Norton A/V at the time through work, but actually preferred AVG.
As of today, they are no longer free.
I've tried Avast! about a year ago, but was underwhelmed.
What are you guys using (other than the Symantec/McAfee for-pay options)?
How effective is it?
TIA,
Fig