#1 - Fretted 5 bolt-on, active/passive, soapbars, ebony board, mahogany/koa, rounds. Most modern sounding, great axe. To me, too valuable to take to certain gigs or to fly.
#2 - Fretted 5 bolt-on, active/passive, same model but "Japanese" rather than US, alder/morado, Nordstrand big single pickups, TI Jazz Flats. Used in passive mode about 85% of the time. I'm OK using this in pretty much any context, and it sounds great in virtually all contexts - can't go wrong with it, anywhere (yes, I don't slap much).
#3 - Fretless 5 neckthrough, lined, rounds. P/J, Active only.
#4 - Fretless 4 neckthrough, unlined, flats. Reverse P/J, Passive only.
Truth be told, I could probably do everything I'm interested in with #2, and most everything with either #1 or #3. #4 is on the scene because it's hip, I got it cheaply, and I'm exploring whether I really want/need lines on the fretless. I also like having flats on it so I can cop more of an upright bass sound.
But the basic idea is to cover anything I'm likely going to do with a mix of frets/fretless, soapbar/single-coil, flats/rounds, and option of active or passive on the two fretted axes. Otherwise strongly committed to 5-string. And I'm not in a context where I have to slavishly seek a "P" or "J" sound or look, but can otherwise maximize for what I want to hear.
During a gearhead phase I've had as many as 7-8 basses in the house, and I've been through about 40 instruments in the last seven years, but this current stable promises to be pretty stable - #2 has been my main axe for most of the last 4 years, with incremental changes.
If push came to shove, could live with #2 and #3 only. If could have only one, would go with #2. This bass is dramatic proof that Sadowsky's Japanese "Metro" axes are just as good as the NYC axes, unless you need lighter weight or custom look/features.