Thanks for your contribution, I’m glad you liked our post!
About my favourite site, it’s really hard to tell because every single one of them has something special, but I’d say it’s a tough call between Palenque and Monte Alban. As you said, the lush scenery in Palenque (and in Chiapas as a whole for that matter) is out of this world but Monte Alban has a very unique vibe, and the view on the surrounding countryside is truly a sight to behold! Plus, Oaxaca is a real gem. :)