Battle of the OS

This is crazy, but it needs to be put out there.

I currently have:

1 HP Laptop, running Windows XP
1 MacBookPro, Dual booting Vista and OSX Leopard, and have Paralleles to run XP and Ubuntu under OSX
1 EeePC, currently running Xandros (Eee mode), and soon to dual boot with XP and Ubuntu

Is this too many operating systems? I think it just might.

What’s your preference, and why?