Stacks of 20, with partial stacks on top. I don't build a second level of stacks until I have a triangle of 10 stacks on the bottom. I'll make change for other players as needed but I don't ask for a color up unless it gets really ridiculous. What goes up must come down
If I am eating while playing, I'll make my stacks into a wall perpendicular to the rail. Then I can use one hand to eat and the other to check my cards and handle chips, and not worry about my neighbor seeing my cards when I check with one hand. After checking the cards I put them in front of my stack so they're not hidden.
I don't like having a tall stack because it's easy to knock over. And if it falls over, you may not get all your chips back.