Haha, I had a blue G3 like that and also the big blue and white monitor, seemed huge but I guess it was only 21" or maybe even 19". It died after about 6 months so I returned it to Apple for warranty work. When it came back, the included paperwork called it an Apple "Moby Monitor"

I had to go out to the UPS truck when it returned because the female driver couldn't handle the huge box by herself.
Had one of the graphite G4's as a server at work, I always thought it was the best looking one. And I had a dual G5 as my main machine for a number of years. That was the heaviest computer ever made, and also the hottest. One day it was just dead, wouldn't start. Nothing obvious wrong, probably a bad power supply. Didn't even waste any time on it, my 15" Core2Duo MBP was already twice as fast.
I still have one of the mirror door G4's up in the attic. Took it down to play with last winter and it was working fine. Went out of the room for a few minutes and it was dead. Just took it back up to the attic since that was easier than throwing it away.
Now I also had a PowerMac 8100 that I got around 1996 to run Adobe Premiere (version 1.0 IIRC). That was the worst case design I have ever seen, it was a major job just adding RAM that involved removing many parts, screws and connectors. And remembering how to put it back together was even harder. That machine had 48MB of RAM (all I could afford) and people would come visit my office just to see such an amazing machine, LOL.
But really, I like my quad 2012 mini better than any of those, and it certainly was a LOT cheaper.