Lou
Scooby
I hate to say it, but his believing in anything- ever- means almost nothing to me. His work in comics, film, and television combind, his "believing" in something, from making things happen to things being his best, is usually a kiss of death, as it's not just fails to happen or sucks, but is majorly terrible on an epic scale.
His believing in something snuffs out 98% of my hope.
I disagree.
Joss saw a vision for Buffy and it was hacked all the hell in the movie. But, he believed and later found a better outlet for his vision. He believed in Firefly. Sure, it got canceled, but he believed in it and WHAMMO canceled TV series turned into major motion picture. Something that just doesn't happen. I think Joss's belief is a lot stronger than most people's "life missions".