If it were my dicision to make here is the thought process I would follow.
Scenario 1--Outter Banks/Gulf Coast
I fish feeder creeks and tidal flats for redfish, trout, tarpon, permit, etc. Boat will be equipped with polling platform as well as bow mount trolling motor. My typical fishing grounds cover hundreds of square miles of open large bays and marsh/creek system. I will routinely make runs of many miles across open water bays to get to the spot that I want to fish. It is also common for me to go around the "outside" leaving one inlet and running down the beach to enter another inlet to gain access to water that I couldn't have reached traveling by creek or river. These conditions obviously put me in a position to navigate waters that are constantly changing and have the capability of producing a nasty, close chop that we all know is a PITA. For this I would want a flats boat that had as much dead rise as possible at the transom so that in the event of deteriorating conditions I would have a boat that would allow me to travel on plane with the least amount of ball busting, teeth rattling pounding that a tight chop will give you.
Scenario 2--SE NC tidal creek system
Targeting the same type of species as above, but omit from the equation the need to travel across open water. For the inshore fishing that I do in my area, I could concievably avoid open water for the rest of my life. Because of this I would want the flattest bottom on the market. Polar, Carolina Skiff, Southern Skimmer, etc. These types of boats are hugely popular around here and for good reason. Some of the 21 and 24 foot models provide enough room for a mud wrestling ring in the front
, ping-pong table in the back
, and still leave plenty of room for you to sit in a lazy boy recliner and cast for flounder and reds from the bow.
All kidding aside, if you can avoid open water, get a flat bottom boat.
Limited travel in open water, get something with a tunnel.
Extensive travel in open water, go with the V. As much V as possible.