Some where in one of the posts above I had stated that I was comfortable doing either an english shot or a non-english shot, so to answer your question the best I can is to say, that it is how I learned when growing up. Since I was twelve years old and my cousin took me to American Legion halls, and these old vets would teach me how to shoot.
However, as we all know there are several new disciplines and new knowledge since the days of 'old school' pool. I'm far from a very good pool shooter of course, but I have won a lot of bar games against others using mostly english shots. So...right now I'm in total amazement that I won as many as I did in the past.
Yesterday was an awesome day for me shooting about three hours of which two hours was practicing nothing but non-english shots. The more I did it, the better my success of pocketing the ball. So I started shooting with others as they came into the hall, and I did really very well losing two games to five. I had several good runs though, and was really excited about the increase in my game. Its basically retraining the mind at the set up stage, and I have always been able to do both styles, but this just has a higher drop rate than english shots. I still had to use english on some shots to get position on the next ball, but only in a few rare occasions where the opponents ball was in the way.
In the discussion it tends to get off the subject of this thread, which is, "which style has a higher success rate?" So its not a question of "how do I make this shot?" Those for me are mostly no-brainers. I now can easily answer my own question...non-english shots have a higher success rate.
I hope this answers your question, but want to thank you for your inquiry.