I'm awaiting a whipped dog with a full hollow grind as my first straight. Assuming all goes well I'll look to get either a nice new custom or nicely restored vintage. I understand the difference between the shapes of the different grinds but not the real purpose of each. I have a thick Armenian beard. I've been using a DE for a few years and find sharp blades like feathers and Astra SP's to work best. Is a wedge better for someone with a light beard? Full hollow for course? Just personal preference for what kind of weight you want?