The heavily modified ones.
Squier VM jazz: Neck from my other VM, covered the original black inlays with aged mother of pearl inlay-stickers for a lighter and cleaner look, made a new pickguard, swapped the bridge with a Hipshot bridge, rewired to volume-balance-tone and put in two big Chi-Sonic single coils.
Westone Thunder I: Everything you can think of - I've done it to this one, Modified the crap out of it over the years, still a great bass!
I'm not going to bother with the the slightly modded ones here, that means I can place all my basses in this topic, if you really want to know more about those [url="http://home.online.nl/blablas/bass/collection/index.html"]click here[/url].