A bit graphic design, but I really use OS X as a multimedia center, I constantly burn CDs, watch movies, play music, play games and all that stuff on my Mac...useful purposes are just a part
Pirating warez. Just kidding, but I'll admit, I have checked out Carracho after seeing it mentioned on the pirating thread and have come to the conclusion that it's by far the easiest app for downloading warez and far superior to anything Windows has to offer.
UNIX (for data analysis), MS-Office compatibility (for automated writing of reports in Excel), and UNIX again (for automated sending of these reports to their recipients, raising alarms, if necessary); sadly, this option is not available in your poll
FTP (school work @ home)
LAN (Internet/File Transfer @ school)
WAN (Internet/File Transfer @ school with Laptop)
Server (when My admin feels like showing me stuff)
Client (Using school comps)
Word Prossessing (So i can actually do work other then drooling over the T1)
Games (@ home)
and thats it,... i think...
Wait theres more (forgot my studio Production Job DOH!)
Movies
Digi Effects
(soon) DVD making
Sound Stuff
Image Stuff (still stuck with PS 6 ><)