Home Built Computers

[SuperChief]

Stealing some mojo from another thread, I was curious as to who here has built theiir own computer? If you do, would you mind sharing what hardware/software you're using and what you primarily use the computer for (gaming, home office, etc)?

Also, links would be greatly appreciated to the hardware parts, but if you're too lazy, it's all good. I'm going to start building my own system, and I'm looking for some advice.

Thanks in advance.