What are the classic memes of the fandom?

This fandom have been alived for about 15 years. I know that they have been a lot of memes and references. I randomly stumbled upon some of those, like "Oh desire" video or the Godhatrice 4chan screenshot.

Are they some of those? I'm not just talking about funny memes, but memes that are fundationnal to the fandoms. Memes that every fan of a generation knows. Memes that younger fans may only see through cryptic references without knowing the original source.