He Wasn't Whipped
****SPOILERS****
I keep reading message threads saying that Evan was emasculated or whipped by Charlotte and that is why he made the life altering decisions that he did. I did not see the film that way at all.
I agree with another poster who wrote that Evan realized that he was actually writing his own suicide note as the movie progressed. He wasn't actually living previously. Charlotte did bring quality to his life in that she showed him how empty it had been.
He previously did not have reason to believe the phone would ever ring in his apartment. He had given up on trying new experiences. By what he shouted at "Sammy the thief" we can see he felt unworthy of love.
Charlotte didn't 'guilt him' into changing his profession. His ties with her family and seeing the consequences of suicide on the actual survivors started to change his thinking. Then developing a friendship with Abel and seeing how much Abel still had to offer...
These were the catalysts for his change. He actually got in the LAST WORD when Charlotte left and said she probably wouldn't see him. There was a pause and then he said "okay". I thought that was significant.
We see him in a new direction at the end but anyone who is a writer will tell you that you never 'quit' writing. I'm sure he will find his voice in a new manner and express it that way (in his fictional life of course tee hee).