Today I was playing MvM, there was a really supportive guy that kept saying "Good job team, this way we'll finish this quickly!" And stuff like that.
It really cheered everyone up, but that's not everything.
I died a lot of times and then I said "Sorry, I don't play a lot of MvM, I played like 5 matches ever." and the guy just said "But you're a great medic and that's what is important."
It may seem like it's not much, but that made me so happy, especially because I was only playing Boot Camp and not Mann Up cause I didn't believe in my abilities as a medic.

What kind of compliment do you like the most?