Mac.
Remember when the whole PC thing began in the 1980's? (sure you do, you're even younger than me) Those were Macs.
I had a Windows computer briefly. Virus city.
Back to Apple. Feeling the love. Even my 6 year old bottom-of-the-line iBook is still doing just fine. Sure, it's so old that it can't download streaming movies from Netflix, but my iPod can do that for me. Apples are tough critters. I have no intention of ever subjecting myself to a Windows machine again.
"If Americans want to live the American Dream, they should go to Denmark." - Richard Wilkinson