I use them all, Windows, OS X and Linux distro's.
Mac's fostered the creative design on computers when PC's were basic office tools with minimal functions and floppy disks.
CD drives came first on Mac's, so did hard drives, the mouse, the GUI, higher quality screens with more resolution, and tons of other stuff like faster interfaces and so forth. It's because the creative fields need better quality equipment.
Most all Mac's come with Firewire 800 and very new ones come with the new Thunderbolt interface, promising enormous I/O potential for video. Mac's have optical/analog audio ports for Toslink, giving the best quality interface. Mac's are all what Hollywood and serious creative professionals use, it's a status symbol.
Mac's don't crash hardly ever, as Apple makes both the hardware and the operating system. Programs can crash sure, but they can be ejected out of memory without taking the whole machine down.
Mac's are faster than Windows for the fact that it's not as bloated as Windows, I use all operating systems routinely and Windows 7/Vista even on fast hardware still gets a "spinning circle of death". Very rarely do I see a "spinning beach ball" on OS X, even on 7 year old hardware with the latest OS version. Windows 7 is Microsoft's best work yet, but it's no OS X.
Mac's don't need anti-malware running all the time, you won't believe how much of a relief this is not having to constantly worry about malware. I simply don't know why Windows users put up with it.
Mac's are highly stable machines, the build quality is excellent, they can go for 5-10 years without needing anything, except some more RAM. You don't need to defrag, you don't need to scan, clean the registry or all that BS like Windows, you just use the thing like intended.
Yes you need to do Software Updates on Mac's, but there isn't different options and all this size ways garbage like Windows 7 does. You don't have to worry about Apple installing a "Bing bar" like Microsoft tries to do. Neither is there any PC vendor bloatware or gizmos, trialware etc.
Microsoft has latched onto this idea of bloating their OS to cause hardware turnover and they get people to upgrade from Vista to Windows 7. Most people don't know that Vista can be really fast if factory restored, updated and defragged, (two days of work) but a lot opt for spending the money to upgrade to 7 and being disappointed as it's slow too.
With Apple there are OS upgrades, but not at those prices. $300 for Windows 7 Pro? When Vista was just released, are they insane? Now Windows 8 is coming? Talk about greed!!
Now Mac's can dual boot into Windows Vista/7 (no upgrade disks) or OS X. Or they can (like what I do) run all three (OS X, Linux and Windows) at once using virtual machine software. (needs 4GB RAM or more). Also the new quad cores are awesome, 64 bit so they can handle up to 8GB in the "Pro" laptops, 16Gb for the iMac's (not advised for you) and mucho RAM in the 16 core Mac Pro's (your serious high end machine right there).
So with a high end Mac you face no limitations what so ever. Use whatever program from what OS you please. Even your old software, if it's in XP, you can install XP in a virtual machine (not OEM naturally) software on OS X. VMFusion is what Apple prefers, there is Parallels Desktop and the free VirtualBox as well.
Edit: Comstar
The Mac has high quality audio, even optical audio in/out ports. No noise in the channel like PC's do. Less cobbled together parts like what PC's are famous for, this matters in machine quality.
The Mac you have for video is obviously outdated or not purposed for it, not all Mac's are designed for video pro's. Most are consumer devices, older ones handle SD video, not HD video.
The learning curve with Mac's is like learning a new audio/video program, but less as it's a computer like any other. Things are in different places, often a lot easier to access than Windows.
One can use two button, three button, five button mice, graphic pads, etc with Mac's just like a PC, right click is there and Apple's mice support right click, it's just turned off by default as to be simpler for newbies.
Swapping out OS X for Windows on a Mac is like buying a Ferrari and pouring manure inside. It's the complete experience that is why people rave about Mac's.
Running Windows and Linux on my Mac has made me appreciate OS X all that much better. A quality OS will make for quality results in any creative endeavor. And with Mac's running Windows and Linux too, gives maximum software choice as Apple also makes very fine professional video software called Final Cut Pro.