Clear and simple enough question, but this is Talkbass, so some of us have to get annoying in our responses as I'm about to

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I think it depends on what people (you) are looking for.

If you read the thread I started about my favorite bass being my newest bass, I think you'd take that back. I was crazy in love with my Sterling, then my Bongo, then my Stingray, then my Big Al, then my Caprice.
Here's what I can tell the OP, regarding my experience and opinion.
- First and most importantly, a neck pickup on any of the mentioned basses opens up HUGE palette of sounds that aren't available in the single pickup versions.
- There is a certain burpy, funky, 70s/early RHCP sound that can only be found in 2 of their basses. IME. A Sterling and a Stingray.
- The Bongo has an interesting sound character all it's own. If you watch enough YouTube clips you'll pick up on it after a while. It's a hard to explain, cuz sounds are hard to explain, mid rangy kind of thing.
- The Caprice does not sound like a jazz bass, a p bass, nor any other p/j bass I ever played. It has a rounder, mellower tone that cuts and sits really well in the mix. It can get aggressive - but in more of an over driven as opposed to cutting kind of way.
- It's impossible for me to say which MM is my favorite. It depends a lot on which day of the week it is
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- The 3 pickup Big Al is the most versatile of my MMs.
- Some people think the Bongo is ugly.
- Some people think the Bongo is sexy.
- I don't think a bass can be sexy but I think the Bongo looks awesome.
- On all my active MMs I started considering 1/3 of the way up on the tone controls to be "flat". Preamps are super aggressive, and if you're used to passive basses, doing the 1/3 thing can get you in the neighborhood of Fender like tones.
- Stingray has a thicker, more P bass like neck than the others.
- Stingray (mine, at least) is heavier than all the rest.
- If I were forced to have only one I'd PROBABLY go with the Bongo but couldn't tell you exactly why. I think because I feel I have the most control over that sound for some reason (could just be I've played it the most of all of them).
- If you do go for a double pickup, having owned HHs and HSs I've found the HSs to be a little bit more versatile. The HH Bongos I owned (had 2) were both harder to tame than my HS. Could be a placebo effect due to the dual humbuckers, but I don't think so.
I didn't read the entire thread, but I'll repeat that if the OP writes a little bit more regarding what he's (she's?) looking for in a bass, we all could be of better assistance.