Much in the same vein as the TV thread, I present the websites that make me weep laughing.
27B/6: Australian dude taking the piss out on pretty much every person he ever meets
http://www.27bslash6.com/Don't Even Reply: American dude doing much like David Thorne, not quite as good but still laughtastic.
http://www.dontevenreply.com
I love david thorne's site, always cheers me up!
www.dudeism.com is one of my favorites right now. It's a site, including a forum, put up by an organization called The Church of the Latter Day Dude. The philosophy is derived from the movie "The Big Lebowski". I actually became an ordained priest in the order about a month ago. It is said to be the slowest growing religion in the world but once it catches on Look Out!
Autogeek.net - A vehicle detailing and supplies site with a great Forum. Vehicle detailing is a new thing for me.
HDForums.com - A Forum for Harley riders
WebBikeWorld.com - Reviews of Motorcycling products
Woot.com - One specific item for sale each day
Forums.Roku.com - Discussion of all things Roku related
lifehacker.com - A great site for tips and trick with computers, productivity, and just about anything else you can imagine.
Any site having to do with road maps and road signs (I'm a closeted roadgeek)