Most of the Ceramic surface and the graphite,or carbon strikers are my choice, i stay away from glass,or aluminum.glass slicks up to easily,aluminum seems to attract moisture that makes the striker slip the surface and fail to creat friction.

K&H Ole yeller, H.S.li'l duece or voo duece whatever it is,or Primos Power Slate.Good pots,but unfortunatly the strikers are not graphite or carbon,wich is my top of the line preference. I like a call that can whistle.and that can do that