Holy Crepe these are good! (dad jokes)
I like the palettes that have enough contrast to them to really make that halo pop. I'm gonna leave that up to you to figure out though because I know you will.
The only thing that really bugs me is the ones with every other color. Makes legibility a little difficult.
The re alt mark feels a little forced because it's referring to the main mark, yes, but its information isn't translating on its own. Maybe put that smile/tongue under the halo and o. How can you add in the tagline? Also, gimme a version without the tagline in the main mark.
Rad stuff!!!