I spent the intire month of December and Half of January trying to decide where to dive this March on the west coast of Main land Mexico. The three places I looked at the most was Mazanilla, Puerto Vallarta and Mazatlan.
I don't know exactly why but I really wanted to go to Mazatlan. Maybe because of their location, the farterest north closest to Kansas, where the sea of Cortez meets the Pacific or what ever. The city of Mazatlan sounds very interesting and I still would like to go there some day, but the diving is what finally swayed me. There are no real dive operators in Mazatlan ony Hotel operators and dive reports in the area are rarer than hens teeth. that should be a clue. I foud out that although you might see some interesting fish and sea mammels the sea scape is kinda baron sand and rocks. Another place you might concider is San Carlos, they are way up north on the Mainland only a few hours from Phoenix, but its a little cool there in March.
I finally chose Puerto Vallarta, an interesting City, good diving, lots of operators, and we got a fair deal there. I'll post my report when I return in three weeks, I'll be leaving the frozen Tundra of Kansas on the 16th.................................................................