Last year I went to a talk by John Papa where he mentioned that a lot of people seem to think that it's inappropriate to approach speakers to have a chat or tell them that you enjoyed their talk; while in reality, most of them would welcome it. That's why the first thing I ended up doing right after the talk was to thank John Papa for the positive influence he's had on my development as a software engineer. Nowadays, I try to continue my effort to thank people that have a positive impact on me, however small.