Dell FTW.
2005 Dell Inspiron 600m and 2008 Dell XPS M1530. I also had a 2008 Dell XPS M1330...but I shipped that back to Dell for the M1530...
We also had this really old Mac. If the current OS is Leopard, then ours was running Old Dying Housecat or something. It refused to connect to the Internet and the screen was friggin' massive.
And there was the really crappy computer that GM gave us. Part of some employee computer literacy program or whatnot. Got infected with a bajillion viruses. I ripped out the hard drive and used it for target practice.
And then there was the HP my dad's friend gave us...it was okay, just kinda slow. Still in the basement.