Which Mac do you find yourself using most these days?
The PowerBook G3 series. Ever since the first PowerBook, which I could bring to the bedroom, I've never gone back.
I like the long battery life and DVD movie capability and built in 10/100 ethernet and modem and USB: it's the professional model. I'm looking for the next one with FireWire.
I like the freedom of portability. I've got most of the Macs in my home running on Apple's AirPort RF network, even though I don't have to. I like having a highly networked home.