When listening to your favorite bassists for inspiration, do yourself a huge favor: listen to the way the bass interacts with the drums. This is something that I never really paid much attention to as I was learning (and still don't, really), and now it's come back to bite me in the buttocks. My band is currently tracking bass, and I'm discovering that I have a tendency to attack the bass more like a rhythm guitar player, rather than locking in with the drum track. Not good. When you're practicing, writing a new bass line, or soaking up Fieldy's bass lines, pay attention to the bass drum. Bass is the lynchpin between rhythm and melody - make sure you're solid on both. Don't just go flailing around hitting the strings whenever it pleases you - make every note count. You are part of the rhythm section, so try to make the transition from yourself and the drummer as seamless as possible. You are just as much part of the drums as the drums should be a part of you. Take my advice, or don't. By all means, I encourage people to do their own thing, but it's helpful to know what makes a solid rhythm section before you go off into whatever tangent strikes you. And that's about all I have to say about that.