Ah, yes. I built my machine from parts.
My Linux is Arch Linux, and I'd really only recommend it if you've used Linux for a long time. It takes about an hour of pure CLI to set up, you know. :)
Here's a screenfetch.
If you wanted a Linux that's easier to use than Windows, go with Ubuntu. Or Linux Mint, preferably.
If you want to be a cool guy, use Crunchbang.
Or, if you want features from basically all of them, and you're up for a challenge, use Arch.
For reference, here's a nice hierarchy of Linux. :)
[spoiler]