We docked overnight in Cabo on the NCL Mexican Riviera cruise.  On the first day we did a snorkeling trip that had a good hour ride each way and had some decent, but not great snorkeling.  On the second day we just did a city highlights tour that was just OK.

  I think these cities are more geared to spending time there at beach resorts and going out to dinner at night rather than doing day tours.  The biggest advantage of one day in each port is getting a feel for a place to see if you want to come back.