Most recruiters know that enthusiasm sells.
They tend to come to this conclusion through pattern recognition which at some point begins to looks like intuition.
But without a doubt, more than 90% of the time, the candidate who is most enthusiastic about a specific job will get it.
Because people who are enthusiastic about a job opportunity become deeply curious.
People who are curious listen well, investigate more, research, ruminate, and obsess about their topic of interest.