I definitely feed on the enthusiasm of players. I once had a group that I played with regularly who would say, “Sure! We’ll play that!” and say they were enthused but then be really listless at the table with any game we played even though they kept saying they enjoyed it. And I think they maybe didn’t even realize they weren’t having fun but when you put D&D in front of them they went crazy for it. It killed the fun of running any game that wasn’t D&D for them for me (and the other GM who ran games for the same group).