Well, my high school used various models of G3 iMacs - all running Mac OS 9. The computers used to crash a lot and generally weren't perceived as being stable. My friends and I used to mock them a lot. However, what made me want a Mac was seeing the 'new' operating system (at that time Jaguar (10.2)) on Apple's website I believe. It looked so impressive that I wanted a 'Snow' G3 iMac (the cheapest Mac you could get at the time). I eventually got it and used it for 2 years and installed more RAM, and upgraded to Panther (10.3). It only had a CD drive, which was a major drawback for me.
I sold it (on eBay) and then I got an eMac - again the entry level (cheapest) Mac you could get at the time. I was very impressed as it cost £100 less than I originally bought my iMac for and it had double the processor speed, AND it was a G4 processor, with a nice 17 inch screen, double the graphics memory and a CD-RW/DVD drive. I later followed a MacWorld.com guide and changed the CD-RW/DVD drive to a CD-RW/DVD-R drive for around £40 (i.e. I could burn my own DVDs). That computer last me one year - I sold it last month on eBay.
On January 3 this year, I bought myself an iBook 1.42Ghz, with Superdrive and upgraded the memory, bought a nice LArobe case, an iSkin for the keyboard and iKlear polish kit (which I highly recommend). Buying the iBook was somewhat an impulsive buy - it didn't bring many new improvements over the eMac (like the eMac originally did over the iMac). Only a 170Mhz speed difference, a 20GB bigger harddrive, same graphics memory, however the card in the iBook is better (i.e. you get the nice effect in Dashboard

). However I upgraded the memory from 512mb to 1GB and I am very pleased with it. It also has built in Airport and Bluetooth, so I called up my ISP and there is now a wireless network in my house. And my mobile phone connects flawlessly to my iBook. The iBook also has a TFT display - which I always wanted over CRT.
I know I have slightly went off topic, but the reason I choose the Mac was because of the operating system. I was hearing things like 'protected memory', 'never crashes' and I also loved the look and feel of the OS - even in the Jaguar days! Before I had the iMac, I had an AMD Athlon 1100Mhz, 128MB RAM and a 6GB HDD (which still is going strong and I hope to upgrade the RAM and memory and give this computer something useful to do - it even as a GeForce 3 Ti 200 128MB graphics card which I spent £155 years ago!). So, at the time, I felt it was a bit of a downgrade getting a 600Mhz G3 processor. But I was so in love with the Mac OS that I didn't mind - besides the G3 was probably faster anyway.
My enthusiasm for the Mac platform has only grown. I love watching keynotes (
www.applekeynotes.com is the best website in the world - well apart from MacRumors

). And I am
very interested in Steve Jobs - he is a fascinating guy. I often wonder why people put up with the Windows world. I constantly hear my friends and family having problems with viruses and crashes. I say to they "How can you be bothered with all of that? Macs have NO viruses and NEVER crash!". I have been unsuccessful in converting anyone to the Mac platform, but hopefully the day will come soon!
I like how everything is much easier on the Mac. I know that sounds terribly clichéd but it
is true.
I am certain that I will use Macs for the rest of my life. PCs don't appeal to me. They to me, are cheap and nasty.
The Mac is quality.