I like using the classic force for most lay man. But if i get a heckler i will use the spread cull force.The classic and the cull force both look the same but the cull force feels like more of a free choice to the spectator
The reason is, why would you do a crazy hindu shuffle UNLESS YOU WERE FORCING A CARD? If you weren't, you would do a spread + "pick a card" which is why its more natural