I've smiled, been made happy, said "WHOA", and been made sad. The first three were positive reactions from matcha, gyokuro, pu-erh, and the like. The "WHOA" usually happens the first time I have the tea.
I've been made sad when I drink tea for the first time and end up not liking it. Examples include Darjeeling and Oolong. I wish I liked those, so many other people seem to!
Pu-erh all day today; brewing up water for some rose sencha right now.