I don't like the creases in them when I put them on, plus I'm a lousy folder. Guess I should try the folding technique in the vid.
Live in Houston? Warm weather? Get a spray bottle... spray the shoulders lightly when you take the shirt off the hanger. Press your palm onto the "dimple." Solved. It dries in minutes.
Plastic and wooden hangers only. No wire. Insert the hanger from the bottom of the shirt and not from the neck so the neck can stay fresh and tight. Works wonders for T-shirts. As for the shoulder area, avoid those skirt type hangers like those clear plastic hangers Jeremiah posted.
I hang most things on plastic coated wire hangars, except for knitted things, or things with funky collars - they go on plastic hangars, and I hang jeans and pants on extra sturdy (extra-thick diameter) plastic hangars.
i use wooden hangers for all my suits and sport coats/jackets, but those (decent) white plastic hangers work just fine for shirts.