Who would the forums Brexit voters like to see as the PM that submits article 50 and conducts the negotiations on their behalf? I am sure they have a plan of campaign and preference for a winning scenario.

My own personal thoughts are that it should be a Brexit supporter, if a remain supporter conducts negotiations then they would call "foul" for years to come on any matter that did not meet their expectations. I believe Cameron was 100% right to step down now (he was going anyway) and clear the way for a Brexit candidate to lead the way.
But who do you want?