Honestly, the top-tier jjk quote that completely dominated my feed for months wasn't even spoken by Gojo or Geto. It's Nanami's whole 'Work is crap' monologue, the one where he explains why he became a salaryman. It just hit different for a lot of people, I think, especially anyone feeling the grind. The way it juxtaposes the mundane misery of a regular job against the literal hell of jujutsu society is brilliant. You see it on BookTok over sad montages, or as a text post on Tumblr with people adding 'mood' in the tags.
But for pure, unadulterated fandom energy, you can't beat the lines about Gojo. 'Throughout Heaven and Earth, I alone am the honored one' is basically his theme song at this point. It's plastered on every edit, used as a caption for fanart where he looks particularly unhinged. It encapsulates that specific brand of overpowered arrogance that defines him. The other big one is 'Are you the strongest because you're Satoru Gojo? Or are you Satoru Gojo because you're the strongest?' That philosophical loop gets debated to death in threads, dissecting fate, identity, and power systems.
Then you have the heartbreaking ones. Yuji's 'I am your death' is a gut punch every time. It's shared with minimal commentary, often just the text on a dark background, because what else is there to say? It's the culmination of his entire tragic arc. And let's not forget Geto's 'Are you my one and only best friend?' That line haunts me. It's the core of the entire prequel story, shared with so much angst and analysis about love and corruption.