Let's see. A Mac 128 was my very first Mac, in 1985. After a bit I had it upgraded to the Mac Plus (they basically replaced the motherboard and floppy drive). I also had a wacky video upgrade for that machine that allowed it to use an external monitor and turned the internal monitor into grey scale.
Then I owned a Powerbook Duo 210 and a Performa 475.
I also possessed a Macintosh IIx, as I was the sysop for a club BBS and that was the BBS machine. So it wasn't really mine. Fun fact about that machine - we added an internal hard disk to it, but didn't have the appropriate hard drive bracket. So I tied the drive in place with twine.
I also briefly owned a G3 which I gave to a friend for parts. I currently own two G4s, one of which doesn't work for reasons unknown. It's apparently been scavenged because of its failure to work.