Having played a dozens of bass, there are some necks that feels just bulky, some slim and some just right. Sounds a little like Goldilocks story and I guess it's true for every single bass player out there. There is no one size fits all neck but I think there's a good referenced one for most. Like to know what luthiers and bass players think about the "best" comfortable neck to play on and how so; from a fully rounded to an almost V shaped neck. I have even seen some that goes to an almost flat D shape at the heel. On the fingerboard side where most are completely round these days, radius are also different from different makers. It doesn't feel as much of a difference for me as compared to neck shape but do any bass players feel it contributes to the playability.