I like both P's and J's...pretty much have a love hate thing sometimes. Playing one, I often find myself wishing I had brought the other instead. Weird, and I realize I should be focusing on the music instead, but I obsess over the tone trivia too much I think. What I have learned to adjust to without a blink are differences in neck widths (A, B, C etc), body shapes, weights, and everything aside from the pickups, which IMO are the defining differences between the P and the J. What I find strange, is that it seems some bassists don't see such a broad difference between the P and J in terms of tone, or at least they dont consider pickup aspects to be so defining. Evidenced by describing a bass as a Roadworn, or a Fender reissue, without indicating if it is a P or a J...or a cluge of the two. Also evidenced by some folks preferring one or the other based solely on the neck dimensions, which I find are trivial, as opposed to the pickup selection and engineering which is the true difference to me. Joe Osborne apparently chose a jazz bass as his "one" largely based on the fact that the neck was thinner than a P. I find it strange that a bass can be described either by its model designation or by its owner, as a jazz, simply because of it's body shape, even it is has a humbucking P pickup. Or a described as a Precision, because of its body shape, even though it may have 2 jazz pickups. Hmm, maybe I'm in the minority thinking that the singular defining difference between a P and a J is the pickup aspect, and everything else is trivial to the point of being mostly meaningless.