Rooster Teeth. Home of Red vs. Blue Halo in-game comedy series.
LOL! Rage Comics website. Home of the memes.
Hot Topic's website. Gotta go back to my roots for style. Fun style layout.
YouTube. It's gone through so many layout updates. Some are good and then some are just complete crap.
Unreal Technologies. General info website about their program/engine.
Microsoft/Windows 8. LOVE this new layout. Just like the phone.
XBox LIVE website. It has a forum base. I like how it sticks to the main colors. (that's not a screen shot of my account)
Halo Waypoint's website. It's 343 Industries though. Their site has gotten better.
Activision's website is nicely done. It's clean and organized.
Bungie.net is number 1. Everything Halo related and more.