Schmidt is one of the roommates in 4D, considers himself 'top dog' and runs the loft. He has OCD, therefore prefers to do all of the decorating, cooking, and cleaning to his standards. He is also very narcissistic about his appearance; he keeps a binder of photos modeling his own suits and owns a vast collection of hair product.
Throughout the show, he makes references to his Jewish heritage. He is a Sagittarius, a fact he brings up every so often when describing certain parts of his personality. Schmidt was extremely overweight in his childhood and throughout college. While he has since lost the weight and gained muscle tone, it is still emotionally scarring for him.