hrst: normal exposure (not underexposed) gives me less colour in the highlights, 'underexposing' has given me the best with C-41, ie: exposing the colourful highlights as midtones instead of highlights, exposing them as highlights tends to wash them out.
Overexposing C-41 gives better midtones and shadows (so Im sacrificing the quality of those for the highlights when I expose them as midtones), but doesn't increased exposure give lower and lower and lower highlight contrast as density rises also? I imagine that would be counter-productive, as I imagine the density of all colour layers gets closer together instead of having more separation?, becoming more neutral looking, at least that is what I think from looking at normal exposure and bracketed shots.
I could try another roll next time there is going to be a pretty sunset and overexposing it from a 'normal exposure', like I would for anything else I shoot with C-41.
Photo Engineer: I'll try that on something that isn't Ektar, Portra, or Reala, I'll come back with another thread with comparisons when I get the chance.