I just got out of a meeting with a Real Mathematician™ who's interested in my research?? He's not even in my department!!
We talked about the work I've been doing for like an hour, and he gave me some feedback on a preprint, and then invited me to give a talk on this machinery at his department??
Oh my god I can't believe someone else actually cares about the things I think about, I could cry. The people in my department have all been pretty unenthusiastic about it, so it's awesome to learn that someone else is (almost) as excited as me!