Before I got Saturn, CamelCrusher was my go-to distortion for bass. I used it on almost every bass track, either lightly to add a little presence or more aggressively for a harder sound similar to miking a bass cabinet.
Saturn, though, is the ultimate bass enhancer because you can control not only the type and degree of distortion for multiple bands, but also limit or expand the dynamics for each band. And then there's the modulation options...careful, you can fall down the rabbit hole here... which can transform mundane bass parts into incredibly punchy bass parts - use with care.
I'd hoped Saturn would be the ultimate do-it-all distortion tool, but the only thing other than bass that I use it for is vocals. It's great for all styles of vocals. But as a guitar amp sim or drum dirty-up-er, there are better alternatives (D16 Group's Redopter gets a lot of use here on snares and toms). For full-mix saturation effects I still prefer Ozone.