I switch between playing a G&L L-2000 Tribute with Elixirs on, maple neck, and a Jazz with flats on, rosewood neck, through the Octamizer and I guess my comment is just to agree with the above - the cleaner and more 'carefully played' signal you give it the cleaner octa-beast sounds it produces. Definitely a smoother, 'synthier' sound from the Jazz with flats and a more aggressive, sort of even distorted growl from G&L with rounds.
You can do some tinkering with the balance of levels of octa and clean, and the filters - you can find a very sweet spot for any bass you play through it.
The tracking is not great as it is analogue but that is exactly why I LOVE it, how it seems a bit unstable, like an irritated, hungry bear.