Plus, everyone likes to imagine that all the humans were helpless children, but there's no evidence that that's true. Actually, both the tutu and the ballet shoes are covered in dust which is basically monster guts, and putting them on makes you feel "deadly" or something like that. And one of the humans had a freaking gun. An empty gun, but still a gun. Damn those furries for taking a relatively modest character and making her a sex symbol. No need for you to feel ashamed to be male; judging people based on how attractive they are is the fault of insane perverts, not a certain gender. Actually, I can kinda relate seeing how so many fangirls make Sans into a dirty smooth talker and a sex maniac and therefore somehow a better love interest for Toriel (even though Sans is pretty asexual from what we've seen in canon, and Asgore actually has a biological child so he clearly did the deed at some point). As if being more sexual somehow makes you a better character and love interest.
Sans may be depressed, but he's pretty good at hiding it and is definitely not emo. And plenty of characters remember tidbits of past timelines, but Sans is the only one to actually know about the resets. Granted, this could make for interesting fanon stories, like how Sans figured out about the resets in the first place, but unfortunately many fans attribute remembering the timelines to just sans in order to make him more "speshul". And fanon about how Sans and Papyrus found the Gaster Blasters and their possible connection to Gaster can be interesting, but most of the time it just feels very cookie cutter. (And yes, Alphys is very underrated.)