I've always heard about the interaction between the bassist and drummer in a band. How Scott La faro and Paul Motian "interacted" and "communicated" and "cooperated" more effectively than any other drum/bass combo. Admittedly, I'm new to the whole jazz thing, but I don't really understand: assuming all professional rhythm section players can play in time and play lines of similar standard, what makes one rhythm section better than the next? What is the "interaction" that I've always heard about, but never understood? (till now, hopefully) Thanks in advance.