I have very very low standarns for what I need in a PC. I have a relative level of specs, apps that I need, and dimensions I would like to have. Par example:
I need a laptop, any will do. 8-12 inches screen, a processor of some sort that is capable of loading abiword and in doing the AAAAAAA test can not lag after 3 - 5 seconds, 256MB ram, linux, terminator, and bash / dash. If it has to be a stupid web browser, not like firefox or something webkit based, at least give me OWB. Let me have that at least. I also need, at least, one USB port, one audio port, and a 1024X768 screen at minimum.
So what fits that..... A lot of things actually.
ibook G4, ibook G3 (G3 snow 650mhz or clamshell 350), powerbook G4, Acer KAV10, Toshiba Portege 3500 (and 7200), Macbook 2,1 / 1,1, and anything similar. IBM 600X even.
I'm very loose on my PC specs because I don't need the best.
What about for a daily? I actually have specific hardware that I want for a daily, and by daily I mean writing shit, playing at least Privateer Gemini Gold and Runescape, youtube on some dimension, linux, and a music player.
so.... HP NW8000, ibook G4, Powerbook G4, Macbook 1,1/2,1/3,2, Lenovo B575, Lenovo Y40-70, Thinkpad T60.... Working laptops.
Notice I don't mention desktop stuff? Generally stuff that I need done gets done on the road a lot. Bouncing between farms, going somewhere, just not home, but have a laptop. Honestly if my desktop can play TF2 and CSS I'm happy with that.
So what do you need as a PC?