To each his own.  Years ago I tried the pole under the leg and did not like it at all.  It requires too much concentration, was uncomfortable and was too soft when a strike happened to properly set the hook.  I tried some inexpensive rod holders and they were an improvement, but fair from perfect.  Finally, I spent about $30 per rod holder and got some good rod holders and have never looked back.  Since I am generally in back I have a very good view of the rod holder in front.  Also most of the time if it is a decent fish you can hear the drag or the movement of the rod will make a sound so you know that there is a fish on.

Tom T says he like the feel of the jolt of the rod when he hooks a fish.  Sounds like a perfectly good reason to use the pole under the leg method.  At our age any thrill we can get should be taken.