Software today is betting allot on graphics. People prefer to have a cute program that does not do what it is supposed to then a ugly YET functional application that "just works".
There are a lot of programs that have a very nice GUI and do work very effectively. JV16 PowerTools, CCleaner, nLite, Opera, etc, and none of these are open-source. Saying "software" today" isn't very accurate, more of a slightly inappropriate generalization, also taking into account that you stated you haven't used anti-virus in 7 years.
Now astatement like that is making a assumption...
No, I do feel my statement is justified because you guys defend a product like AVG while praising performance over GUI, when AVG's performance and feature-set compared to that of Kaspersky is not something to write home about. As I said, that's where I come in to show which anti-virus can be properly praised about. You can be used to it all you like, but even if the GUI sucks, if the feature-set and performance are superior to many others of it's kind, it's getting a medal.
Like gunsmokingman said, NOT what AV is the best, but what do you use and recommend.
I'd rather people have a proper and unbiased analysis on the truly superior anti-virus programs out there instead of having more people post, exciting the enthusiasts, just to see some n00b say "Norton rules!". That's a waste of time to say that, a waste of space on the forum, and when in reality Norton is the most problematic and memory hogging anti-virus in existence.