I liked Cozumel a lot, but everywhere you go, you are offered something! It can be very annoying. The best thing to do is keep walking. There are many shops by the port and nice stuff to buy. There were so many activities!
I chose to go swimming with the dolphins. My parents chose to watch, but they still had to pay. The drive to wear you go is about five to ten minutes. When you get there, a guy will give a very LONG AND BORING explanation of what to do. This is very unneeded. He takes forever to explain and it is very hot. You are just dying to go in the water. They pretty much give you a quick explanation of what to do when you are in the water already. You can watch others to! What I suggest is staying in the shade and watching a little bit. If you want to know what to do without watching, just email me. Swimming with the dolphins was such a fun and sweet experience! Such cute creatures! I loved playing with them! I also got to pet a manatee!
You are not allowed to take any pictures. The company takes them. They are ridiculously priced! It is $25 for a single photo. I don't remember the price for a CD but it was expensive! I suggest only buying one photo. It's nice to have!
Swimming with the dolphins was just amazing. Cozumel is the best place to do it! It's so much fun and definitely worth it!
Try brushing up on your Spanish! You'll be respected more in the shops if they know you know a little bit!
On the main drag, I definitely recommend trying ceviche! Ceviche is shrimp with onions and tomatoes cooked by acid. The acid is from a lime or lemon. It is delicious and a great lunch!