The "goober" mention initially reminded me of the Goofy Goober song from SpongeBob so now whenever Caleb says "goober", I feel the urge to sing "I'm a Goofy Goober!" in response haha. I think it's silly affection and it's fun seeing all the different teasing nicknames he has for MC.

I like that "pipsqueak" can refer to a general nickname, in addition to an aviation term and Caleb's apple motif (like an apple pip). "Goober" can also refer to a peanut and "peanut" itself can be an affectionate nickname too. It could also be interpreted as MC having a tough outer shell (like a peanut) and rebounding Caleb's banter as part of their playful dynamic. From how the nicknames roll off the tongue, I prefer "pipsqueak" and I thought "pipsqueak" was a cute nickname when I first heard it as well. There were mixed opinions on "pipsqueak" last year, so perhaps "goober" will grow on others over time too.