I've used a PC since 1991. Still have a P4 1.8GHz, Dual Celeron 366@500, Pentium 75.
I just got a Powerbook G4 15" 2 months ago.
I like Linux, but it is not even close to being useable for the desktop.
That's why Mac OS X is awesome. Everything looks nice. There are some UI things I don't like and a lot I do like.
I have mixed signals between my PC and Mac. I switched to the mac 100% now because honestly who needs more than one computer at home.
I'm running Apache, Mysql locally and don't have to ftp my files anywhere to test my website before it goes live.
All the apps other than games are the same. Of course it will take you a lot of trial and error to find comparable apps. The only thing I haven't really found that is as good is: Mirc and Cuteftp. I use Fugu and Xchat or Bitchx depending on my mood. But they aren't as fast.
Internet Explorer is way faster on PC. Safari is the best browser on MAC but it is still slow.
In comparison, my PC is more responsive. My menus open and load way faster than my MAC. It doesn't bother me, but it's true.
I think i've only gotten 1 virus in the past 6 years. I never run a scanner on PC. I just have it installed to scan every month or two.
It's nice not to have hardware problems with the MAC. It's put together with quality components. I can't really say that with machines i've built. There's always some weird shit that happens.
I don't like the Powerbook keyboard. The lack of home, end, page up, page down buttons is really annoying. Also not being able to Alt-letter of the menu you want to drop down slows me down. You can turn full keyboard access on but you still can't go to a specific menu.
In the end, it's preference. I can do the same shit with my PC and MAC. I like tinkering in UNIX so I like Mac OS X more lately.
I like ALT-` and I hate it. I dunno half of me likes the dock and the way the finder works and half of me likes the taskbar mentality. Maybe it's just habit. But when i'm working in many windows it really starts to get cluttered. I can sit and hit COMMAND-H but then my dock gets cluttered. The Taskbar is cool because you can open and minimize really quick and visually see it. You don't see that when you have the dock minimized.
Anyways.. ask me if you want more comments..