Shirts need room to breathe, a minimum of 1" on either side of the hanger. Cramming them on top of each other creates a hostile environment. At the end of the day, a shirt just wants to kick back and chill in its own space without a bunch of other shirts in its face.
Quality hangers are important because they are what hold up and support your clothes. Imagine the horror of being hung on a pointy wire hanger?! "No more wire hangers!" please. My personal favorite is grey velvet. Grey is a soothing neutral color and velvet is well, velvet. You may think this is a bit extravagant, but your clothes treat you very well, so return the favor.