I've been using Windows XP for daily-use computing since 2004, and 95-Me before that. However, as Windows increasingly goes in directions I'm not interested in (I didn't like the changes from XP to Vista, 7 didn't address them, and 8 looks like everything I despise in modern computing conveniently packaged into one bundle of ultra-hateability,) I've decided that I'm not going to be using it anymore. (Though I will be maintaining an XP box for my music endeavours, I think.)
Which means that this time when I say I'm getting into Linux I
really, really mean it. I've currently got Debian running on my Power Mac G5, and I'm going to be using it as the main OS on my new PowerBook G4, which will replace my Asus Eee as my main machine once I've got all my documents migrated.
I don't care for OSX all that much, but I do have it on my Power Mac G4, and it will be on the PowerBook as well, for running Classic applications and Photoshop.
And of course I'm running Workbench (3.9 currently, though I'm looking at downgrading to 3.1 with ClassicWB) on my A3000