Time to create some content!
For me the Power Macs G4 have an absolutely timeless and pristine design. Especially the Quicksilver stands out as the perfect workstation design. Even though i have/had several G5 and Mac Pros, which are landmarks in computer design too, i don't hold them in veneration as much as the G4.
Could also be because i grew up with them. My father has a printing company and has been working with Mac all along. My first own computer was a G4 DA 466MHz which i "inherited" from him. After a brief interlude with an iMac G3 (much more compact, but slow af and no hardware to play with), i bought a G4 QS 733 second hand for about 200 bucks in 2005, but it died the PSU death soon after. Unfortunately my dad sold his QS 1GHz DP some days before for a G5 2.7 DP. So i ended up with a G4 MDD 867 DP, which served as a print server for several years after my switch to intel Macs. Two years ago i did want to sell it, but the PSU was dead. So i tinkered with it and built in an atx PSU. But instead of selling it, i got infected with the Power Mac fever again. Fast forward, my GF isn't as happy with my considerable collection of G3-5 as i am.
These are the regularly used ones for LANs etc. Some more are stored in their original boxes, others are ready for restoration. I now own at least one ex of each series of desktop and mobile G3, G4 and G5 since the iMac G3, except the Clamshell iBook. They are either in bad shape or ridicilously expensive.
My first QS had a ZipDrive. At least mine had a special plate like this one
Unfortunately my only Zip-Mac now is a B&W G3.