Well... Heres my story. First I used Mac OS, alot... But it was really annoying because it was a power pc, which is now outdated...
My family went through like three of those. Then my dad got a windows xp machine from work! yay!
except this story is not done yet, XP was kinda glitchy despite the amount of RAM and stuff... So the I got Ubuntu! Which I used for several months before I wanted iTunes alot... So I installeds Windows XP again. Then it didn't install the proper drivers for audio or network or something,. I got that sorted out. Then within days of reverting back to Windows XP, My brother because he's in college Get a TON of expensive software FREE!
So I got Windows 7 and 8 (not the release preview if your wondering,the real thing!). So I had Windows 7 on there awhile cause I heard good things about that and bad things about Windows 8. So I had Windows 7 on here for about 2 days when I wanted to find out if Windows 8 is really that bad. Guess what! I really like it!
And so Windows 8 is the current OS I use. Its not complete yet but hey, it doesn't even come out til next month, so hey! And that was all within a year also.