When I'm writing, I sequence the bass part and use a free VST plugin called 4 Front that emulates a Fender bass. The plugin does a fine job of giving you a clean, realistic sounding Fender style output. But it's always been a hassle trying to take that and then get a realistic bass amp tone. I've thrown the kitchen sink at it - channel strips, Distressors, VST amp simulators, etc. - and it's just never quite right. I'm not a bass player and if I had trouble dialing in guitar tones, it's even less impressive for bass.
But wait! Right there in Rig Manager there are 98 profiles for bass players. Point my 4 Front output to the K reamp in and poof - instant bass player. One of the things I'm really enjoying with the guitar profiles is that I don't just get a well miked guitar stack. I get the talent of people like Michael Britt to dial in killer tones for me. Turns out that works just as well on bass, making me look good where I have absolutely zero talent.
You know, I think I'm gonna keep this thing.