I love how the show slowly unfolds and shows us how Steven was created, how much of him is a reflection of the only happy memories of Marc's childhood, breaking down Steven's life more and more.
A few examples could be:
-Gus: the one finned fish that Steven loved, later discovering that his love for this precise fish comes from the memory of Randall's drawings.
-"Laters, gators": this cute, childish goodbye that I personally adored. Really the embodiment of his character, it's something that Marc and his mother shared as a kid, as a matter of fact we mostly only see Steven say it while on phone with his "mother".















