Have had a bunch over the years, but here's what I've kept, in order of purchase:
1979 John Gray custom 4 natural Bubinga - my first custom, it still sounds great, I mostly use it for recording, but play it occasionally
1992 Peavey DynaBass 5 gray - my first 5str, bought to see if I liked 5's, it's my emergency bass staying at church, played rarely
1993 Tobias Standard 5F natural maple - a nice fretless with an acrylic fretboard, played occasionally for fun
1975 Fender Precision natural ash - the maple fretboard with original flatwound Fender strings give this a really punchy sound, my wife (the piano player) loves the sound of this one
1992 Modulus Quantum 6 natural maple - until the recent Alembics this was the bass I played most often, but now it gets played only in questionable situations where I won't risk the Alembics
2003 Fender Custom Shop '59 Precision Sunburst - love that classic P-bass sound, it still gets quite a bit of use
2006 NS Design CR5M upright - broke both wrists and couldn't play bass guitar so I got an upright (finally had a good excuse!), this one's fun to play and sounds great, used frequently
1999 John Gray custom 5 natural Bubinga - original/previous owner was Gary Strater of Starcastle, I got this just before my Alembics, looks way cool and sounds great, haven't played it recently
1999 Alembic Rogue 5 wenge top - my first Alembic, I prefer the sound of this one to the 6str, so I swap between them for most of my playing
1998 Alembic Rogue 6 walnut top - my second (but not last!) Alembic, I like having that 6th string, but wish it had the same build (scale, electronics, top) as my 5str
So I'm still on my quest for the perfect bass but getting closer. It's a 6str Series II, 35 scale, ebony neck lams, ...