It does all depend on so many factors. In my last band we were a punk/Oi trio, where the guitarist was the lead singer. Usually the bass in such set ups needs to fill things out a bit, however, and rather bizarrely for the genre, the singer had a good melodic voice and we soon found out that any clever bass lines I played simply got in the way of his melodies. So less was more, for our specific set up, after all as much as it grieves me to admit it people wanted to hear his singing and melodies more than they did my bass. Strange I know.....