Most media professionals that I've come into contact with, however, use Macs. The exception would be 3D artists. I may be biased, however, as my observations come from SF Bay Area creative companies (game companies (EA, 3DO), web design, post-production houses, VFX, Pixar), all I see in these places is a sea of Macs (some PCs here and there).
If you grew up using PCs, I can understand why you might want to stay in your comfort zone. Personally, I get LOST on a PC 'cause all I've ever used was Macs.
My hometown, however: Cupertino, CA.
My advice: You should use what you feel most comfortable with that provides the tools you need.
Kevin Monahan
www.fcpworld.com
Author - Motion Graphics and Effects in Final Cut Pro