Yeah that was me with Banjo. I'll probably do the same with Geno.
I didn't scream for KKR nor Ridley, but I was like "oh hell yeah, nice!".
I can't recall all of my reactions for each character, but there were a few things I said that really stuck out to me the moment I realized who was being revealed:
Ridley: "Whaaat?! I thought you said he was too big, Soccer guy! ****** Ridley forever!"
Krool: "No way, it's Krool??!!....(D3 trolls)....NO! NO! Don't do me like this, Sakky, my heart can't take it."
Hero: (Sees horse riding through the forest) Ah, ****, it's Erdrick.... (Luminary appears) Wait, wha-? That's not Erdrick... (Erdrick appears with other Heroes)....and ****, it's Erdrick."
Banjo: (Sees jiggy) OOOOOOHHH, ****, the leak was real!!! (DH trolls) Yeah, yeah, **** you too. Show me the money! (B-K appears) *Squeals like a little girl*
Terry: (watches NEO GEO people trying to get Smash envelope) Oh, oh, it's.....wait, no, it's....wait, who are these people again? (Terry grabs envelope) Holy crap, it's.....Ken....with a hat.....NICE."
Byleth: (immediately recognizes the animated arena from 3H) ".....aaaaaand ****. It's Byleth."
The End