Best places to vacation in Mexico?

We really like Cozumel. They have hotels in all price ranges. Look at the Applevacations website or Worryfreevacations. You get more for your money if you buy a package. The water is incredible. It is an island with the most amazing snorkeling in the world. I think it's the 3 best in the world. Very safe. Lots of shopping. And they use the american dollar everywhere. We never needed peso's. Cabs are cheap and will take you anywhere. There are fishing excursions, snorkel excursions, some small ruins, a lighthouse. This is a great vacation spot for anyone of any age. We like the El Cozumeleno best for it's location, beach, and snorkeling. Do visit those websites for more info on other places. We are going to try Puerta Vallarta in June. Never been there but it looks gorgeous. Good luck and have a great time where ever you decide.