"Number of strings" doesn't matter. A "great bass line", that's what matters. Playing what is right for the song, whether it is 3 notes or chordal changes with a tapped melody over top.
If I want to drive from Austin to Los Angeles, I could choose to drive in a luxury car, a economy car, an SUV, or a sports car....heck, I could even choose to go on a motorcycle. All of them will still get me there, albeit some "faster", some with greater "comfort levels", and some with better "economy". What matters is that they all get you to your destination...everything else is "personal preference".