I use exclusively Linux nowadays. Ubuntu to be more specific.
I always, always hated Microsoft products. My first computer was Commodore 64 in 1983, when I was about 4 years old
Later Atari for many many years, then PCs from 8088 to 486, first MS-DOS, then Windows 3.1, then Windows 95,98,2000 and finally XP.
The times when I had to use MS systems I always felt kind of queasy with my computers, hated the operating systems. Then one day 4 years ago I simply had enough of it..Enough of viruses, spyware and the fact that it felt like Microsoft owned my computer and not me. I took a big hunting knife and let the XP cd (original!paid for!) simply HAVE IT. Felt good.
Installed Ubuntu Linux since Id heard its easier for beginners. Spent next 3 months playing with it, fucking my system up and generally learning about the new system and its intricacies...and having FUN with MY computer! Finally it was mine again, I could see all the details of the system, change whatever I liked and generally do all kinds of things that were impossible with Windows. Not to mention it was free, and born of a free exchange of code and ideas. Sharing and co-creating. Now I like that
Now I use only Linux, have tried many different ditributions (Suse, Fedora, Damn Small Linux, PCLinuxOS etc) but like Ubuntu best. Ubuntu is running both my two desktop systems and my old laptop. Never going back to proprietary systems. Knowledge, code and information need to be free