the crankset is the only thing that matters? I don't have to be worried about being too tight against the chainstays and the ring hitting it? or having a chainline that I can't get straight because the spindle sticks out too far or is too short?

so i can just pick out a crankset i like, get a bottom bracket that has the appropriate length for that crankset and not worry if I'll get a straight chainline with whatever hub is on the rear?