well, growing up my main tune was singing along to the song of time from Ocarina of Time and especially Majora's Mask, as well as the other songs from the n64 zeldas. since then though, I've noticed I now focus on far less dire, much happier tunes
today, these are my two biggest humming jams
they're both so feel-good
Anata no combini, Tomato!
and this is probably the GOAT. such an aggressively charming, happy, lovely little melody. I associate the franchise so strongly with this song, and that is a great thing