They're not just pretending to dislike the idea in order to find a legitimate-sounding excuse for rejecting you. How hot a deal you are and how much they like your personality really does affect their opinion of the idea.
The same investor will react differently to the same idea based on how hot a deal you are and how much they like your personality. If you're not a hot deal and they don't like you, they'll look for reasons to hate the idea.




