I've been using Mac since I've been using computers. The last 3 years, I'm also using a Windows computer regularly.
I like the Mac interface. I find it far more intuitive than the Windows one. I like how I can just buy an iMac with everything I need in it, without having problems with drivers. I find them very nice looking, although this is not a big issue. I like how I get the iLife applications for free if I buy an Apple computer, so I got easy to use applications like iMovie and iPhoto. (Although I'll admit I'm no great fan of the latest iMovie).
Maybe it's just because I've grown used to it, but I really really dislike the Windows GUI. I got a Windows XP and I find it very bleh.
Some issues that might be minor but annoyed me:
-When I insert a USB/CD/external harddrive, I see no icon appear on the desktop. I want that.
-I find the search feature extremely slow and wtf is that dog doing there.
-I find the icons rather bad looking.
-Window's Auto updates are a mystery to me. I don't see what programs it updates and what it did. It also has the annoying tendency to appear to warn me about a restart even though I clicked on the 'restart later' option when the friggin popup appears.
etc etc. I've just grown fond of Mac OS 10.5/10.6 by now <3
But at some point I just had to get a Windows machine . At first school kinda required it, as otherwise I had to do all my computer-based homework at the schoolibrary and that sucks. Secondly, although Macintosh had some great games (Marathon,Duke Nukem, Starcraft & other blizzard titles, Simcity 3000 etc) , some of the games that looked way awesome to me were not ported to Macintosh. Also, Apple simply refuses to let the prices of games drop. I like Apple, but if they sell Civilization IV for like 40 bucks when I can get Civilization IV + 2 expansions for Windows for only 20, I prefer the Windows one.
So now I like to think I got the best of both worlds. For surfing the internet, MSNing, and general non-gaming activities I use my Macintosh account, and if I want to play Team Fortress 2 or STALKER I use Bootcamp to launch Windows.
I admit, I was an Apple fanboy once. But now I'm older and I see that Apple is just another computer brand. I like it, but it has it's flaws. I now just can't stand computer fanboys anymore, either Windows or Apple ones. It's pointless to debate which OS 'sucks' or not, it's all personal opinion. We're not making fun of people who drive in a different brand of car, or use a different brand of air conditioner, so why this war between Windows /Mac is going on goes beyond me.