The main purpose of a drop leg holster is to keep it accessible while wearing bulky chest rigs or body armor, where it would get in the way of the waist level holster. If you're strictly a pistol user, chances are, you won't have a bulky chest rig, and wouldn't have an issue with a waist holster.
For myself, if I'm wearing a rig and I really don't want to wear a drop leg holster with that setup, I would usually just insert the holster in my right-most mag pouch of my chest rig.
With that said, it's faster to draw from a waist holster, and it doesn't flop around when running, whereas drop legs do flop around a bit more when running.
Last edited by ILLusion; September 9th, 2009 at 15:52..