Something I thought about this week, is in my old punk band, I loved playing my Jazz, always really comfortable, but in my current (country) band, where I often play higher up the neck, I often get hand cramps during a gig, so I've taken to playing my Spector, which is much more comfortable higher up the neck. So i just compared the necks, and although the Jazz is slightly narrower at the nut, it's much wider at the end of the neck, where as the Spector is only slightly wider than it is at the nut. I guess that's why I prefer it when I'm playing higher up.
So... is this a common thing? I assume it is on all Fender-types? Are there basses with no taper at all? Not that there's much on the Spector, and I'm happy playing it, I'd just like to try out a couple of others and see what I might find more comfortable during a gig.