Though my FIRST synth (well, access to a synth, anyway) at the college I attended was a EMI/Putney VCS-3 (we’re talking 1972 here…), my first self-owned “real” synth was my “Original” Wavestation keyboard that I still have. I later picked up a Wavestation SR for the rack, for its tons of additional sounds. (Both have been utterly eclipsed by the Korg Legacy Collection version of the Wavestation, though!)
My second “real” synth was the additive-based Kawai K5000s, which I also still have and has one of my favorite keybeds of all time.
I also picked up two Yamaha TX81Z FM synth units at two local pawn shops really cheap, which sound great slightly detuned from each other!
Finally, I have an old Ensoniq ESQ-M rack unit (better pics here), the rack version of the SQ-80, I believe.
Controlling them all is the ultimate piece - the “MidiQuest by Opcode 8Port/SE” MIDI splitter/combiner/rechannelizer/etc. box, with 8-in and 8-out. I keep an old Windows 98 machine running just to program it via a parallel printer port! (It does not need the computer connected except to program it.) I run that into two USB MIDI interfaces (my MOTU 828 and a MIO) so I have two separate ports, enabling Midi Quest 11 by Sound Quest, my editor/librarian software for them all, to work from inside my DAW.
I have Cantabile talking to all of them when at home, of course!
PS - we won’t get into my Korg S3 drum machine/sequencer and old standby Kawai Q-80 and Q-80EX MIDI sequencers – yet.