Started off on a Fender PJ I borrowed from Middle School.
No surprise that the 'sound in my head' is still, after much trading, a PJ5, Fenderish tone.
For me ... and boy did I take a lot of time and money and shipping and being disappointed on the gig ... I just can't make a 'fancy' 5 like what's in the video, and the moving van's amount of basses I traded away with boutique wood/electronics/everything is proof of it.
But ...
I ended up pretty much following Johnny Long's advice, after some bad experiences where I fumbled all over the B-string live. I got to the woodshed, and what I picked up about different positions, 'those notes' from Low Eb down to Low B, and all the rest, fundamentally transformed how I play/approach the instrument.
I'll never ever be able to go back to a 4-stringer. Period. 5-strings is THE standard for me.
Interesting to me to think about how I ended up going back to that Fenderish PJ sound after all that trading of the 'boo-teeks'. The tone and more importantly the ergonomics of my Sadowsky PJ5 and Olinto P5 ... 20 frets, 34" scale, rosewood fretboards and P body shapes, and of course the pickup position that makes it a 'P-Bass' ... makes me feel more at home.
I loved some of those fancy basses ... a 'one that got away' Smith 6'er in particular ... but keeping that 'Fender P with a B' thing in mind really helped me feel 'at one' with my 5.
The hard part became, as Johnny Long said, learning how those low notes affect the ensemble and are, for the most part, simply not needed. I went through my 'overuses notes on the b-string' period. He's absolutely dead-on about that. Essentially I'm playing the range of a 4-string bass, for most of my playing.
Funny how everyone mentions a low B on a 5-string. I like that open string sound, but to me, after owning/evaluating a bunch of basses, the Low Eb walking down to my favorite note, that first-fret Low C, is what separates the master builders from the 'that's OK' cheaper variants.
Oh, and even though Johnny was a bit clunky in expressing it, I know exactly what he means in having a bass that sounds so good ... you're 'best bass' ... that you can get away hitting some clams because the dang thing just sounds good in the mix, but all the true musicians know.