Started carrying horizontal with flaps years ago, but went to a vertical open top pouch when I got on my current department. I also moved the mags from my gun side to my radio side. They don't get in the way, they're comfortable, quick, and secure. Now I'm exploring going to an open top triple mag pouch. We'll see how that goes.
"The worst tsunami of stupid comes when the citizenry attempts to operate a vehicle." - Nikerret