It's a question that gets debated here every so often. Probably more important on performance boats, planing hulls, push boats and tugs. Find what works for you with the least vibration and be happy. Find a good prop shop to work with. It's a black art that involves voodoo and sacrifices. Best to use a professional.
I'm tired of fast moves, I've got a slow groove, on my mind.....
I want to spend some time, Not come and go in a heated rush.....
"Slow Hand" by The Pointer Sisters