That might be true in the very short term, but in the medium- or long-term, no one actually enjoys working with "fun" people who have zero or negative productivity.
In which case you join me in disagreeing with the statement that 'the only real-world metric that matters is "how much other people want to work with you'."
Okay, fair enough. I shouldn't have taken that sentence out of the original context, which said "By how fun they are." Or maybe I just totally misunderstood palish's point; actually rereading, that seems more likely than not. Apologies.