Of the stadiums that are being used today, I have been to six.  Years ago I also went to six that are now long-gone, including the three that used to be in New York City.  My favorite of those was Brooklyn’s Ebbits Field.  Today my favorite is Fenway Park.  I very much want to get to Wrigley Field some day.

Here is a good article comparing and rating the thirty stadiums now in use.

https://www.washingtonpost.com/graphics/2017/sports/how-many-mlb-parks-have-you-visited/?utm_term=.9d339803ebce