I'm headed back to Mexico in 2 weeks, its starting to seem like old hat these days. Definitely the free scuba diving, and huge amounts of free booze are nice though, makes the 9 hours of travel time totally worth it. (Though this time, due to scheduling circumstances, its going to be a 13 hour day of travel).
alyss:
You should totally post pictures when you get there 
I've never been to Mexico.
I've never been to Mexico.