Pro gamers are usually obligated to behave ethically, abiding by both the explicit rules set out by tournaments, associations, and teams, as well as following general expectations of good sportsmanship. For example, it is common practice and considered good etiquette to chat "gg" (for "good game") when defeated.
I think the "deepest" thing I ever did was in summer 2009 circlejerk with my internet friends about listening to Gary Jules' version of "Mad World" unironically. Like talking about how much you loved that song showed how thoughtful and tasteful you were.