It is a personal thing, but I prefer shot pouches and English heads. I have a shot snake (from TOW, made very good though) and I found it to be in the way when I mounted the gun and it would want to scratch the gun, if I didn't pay attention.
I have been using old original shot pouches for a few years. I like the way they meter, but the leather and stitching is old and fit more for decoration then use. The new ones with the Pedersoli heads have BAD springs in them,the gates don't open far enough, but the leather is good. At Friendship, Circle Fly, was selling a new shoot pouch that is made in India, I think. Very, very good pouch! Good spring, the gates of the measure open as they should and good leather. They were selling them for $45. I will buy a couple more of them.( each gun needs two of them on a "hot day" of dove hunting) They measure in 1 1/4 and 1 1/2oz. I only shoot 1 oz. loads,in my 12ga., so I go to a hobby store and find brass tubing that is a nice snug fit into the flask head and make a sleeve. I then trim the sleeve to length until it meters the amount of shot I want. Real simple to do, and you can make sleeves for any amount you want to dispense. I have one for my 20ga. that is sleeved to 7/8oz. etc. I have both shot pouches and shot flasks from Circle Fly, that are copies of the old Hawsley shotgun pouches and flasks. GOOD STUFF!