Brain first, then carrots.
But seriously:
I've owned and gigged many. Fender Jazzes, Precisions, Gibsons, Rickenbackers, custom-builds, home-mades, knock-offs and others. I've put some time into thinking about musical/magical aspects of low-toned instrumentation. For the last few years, I've found myself gigging Ibanezs.
Not too long ago I got to play a friend's Rickenbacker 4001 bass. I hadn't had a Rick in my hand for years. It was kinda like putting on an old shoe. I knew almost instantly how I had come to like the shoe/bass and also almost instantly why I had decided to set the shoe/bass aside. Some might call this experience.
I think the magic is likely to happen for me in the neck profile. Or, probably even more likely, on stage in front of hundreds/thousands of people enjoying the magic that flows through.
Q: Through? Through what?
A:
YMMV