Awesome! I'm excited for you to finally be here... or there I should say, since the Yucatan is not precisely next door. But that part of Mexico has plenty to offer too!
It seems like you've already had the obligatory Chicken Pizza! If you're into Mayan sites, I would recommend Uxmal and of course Palenque, a bit further in Chiapas.
Oh, and no matter whether you're traveling in a large group or a small one, you really should stop by in Mazunte on the coast of Oaxaca! I'm certain you would love it. Let me know if you do, and I'll get you in touch with Itínera Theater where I helped build the Earthship Inspired theater. They are wonderful people with fantastic projects and great music.
And of course I'll be following your journey here, and get ready to show you Mexico City once you find your way up here. Until then, enjoy the South!
RE: Mazin's Mexican Path