My comments:
Category one:
I'll agree with salt and sugar, but I'm getting to be less of a fan of Paprika. Been researching a lot and in another forum we've talked about how this can get a "burnt" taste and I'll agree. I vote to leave it out, but hey, I can be overruled if everyone else likes it.
I'd suggest a 1/4 cup of table salt (kosher is too coarse) and 1/4 of granulated brown sugar or turbinado
Category two
I like all of these, especially the three peppers.
I'd suggest a TB of Granulated garlic and Granulated onion and a tb of the others
Category three
I'm still thinking about these