Good question.
My main day-to-day use system is a MacBook running Snow Leopard. It feels nice enough to do all my wordprocessing and such on aswell as web browsing. I also use and iPad to do tasks on.
My Windows rig is running Vista. This is pretty much a gaming system, if dated now, that really doesn't see very much use other than gaming and Winuae. It also has Ubuntu on it that I use for day-to-day things. But it need updating as it's still using a beta release of the latest Ubuntu and as such it's a little broken at the moment.
My Amiga 600 has just had a major overhaul and has now become a Whdload system. I am planning on putting some other wordprocessor and productivity programs on to make it a little more usuable when I can't be bothered to turn the laptop on, such as doing retro reviews.
I don't have so much trouble jumping between systems. Just every so often i will catch myself trying to do a Mac command on a windows system only to find the start bar pop up at me. Or I will try to do something on the Amiga terminal that I know it wont do lol.
