gratuitous author insert in a narrator function; making the fourth wall literal and having the author-insert interact with it; the author-insert has an assistant character; the author insert is generally made to look silly

the story involves many different alternate versions of the characters from slightly different realities, which interact

there are aliens

a large proportion of the cast is gay or bi

everyone has magic powers and abilities

(of course many of these are general webcomic tropes that are hardly unique to homestuck and EGS, but still. maybe we’ll have a time travel storyline soon to seal the deal…)