I got involved in building a custom gaming rig with my brother. With a little researching and hunting for sales on Newegg, we finally put together a machine clocked in at 3.0 ghz Core 2 Duo (Quad at the time was pricier), 640 GB hard drive, 4 GB DDR2 RAM, an ATI Radeon 4650 Sapphire video card, and a huge Antec 900 case with blue LED lights. It was built around the 2008 holiday season and still runs like a champ with Windows 7. For any desktop I will never stop building. For any notebook, on the other hand, I have yet to switch to Mac. Currently I own an HP dv3t running Windows 7, and have taken good care of it through my college years thus far. Perhaps in 3 years I'll bite the bullet and try the MacBook Pro (or whatever it will be called by then), and hopefully take advantage of some new features that people are still waiting for either its release or prices to drop (SSD and USB 3.0). It might be a while, but it's worth the wait.
So all in all, I'm not an ex-PC enthusiast, but on the verge of making a switch with the notebook experience. 😉