Basically, PC's are best for data management type tasks...they work best for "left-brainers"...people who are organized and think linearly. Mac's are best for "right-brainers"...abstract thinkers. The best research and data management programs are best run on a PC. Graphics and some of the best film editing programs are Mac based. Even though, in theory, Quark and other graphics programs are available for a PC, when it comes to converting to a Mac based image setter, strange things happen (fonts change, lines are dropped, etc.).
In our business, we have to have both systems. The interconnectivity factor is getting better, but isn't quite there yet.
Would love to only have to maintain one system.
Russ