Sophie/Headcrab Cat really likes the view from up top. Sorry about the laughing - it was just too funny. :)
In response to a couple popular questions, I honestly have no idea what breed they are! I adopted her and her brother Malcom from the Humane Society close to where I live, and there was no official kitty pedigree in the adoption papers.
EDIT: Wow guys! Thanks for all the love for my kitten! Glad to know the internet approves. :D And yep, my roommate totally does look like Gordon Freeman. It's kind of ridiculous.