What works for you is what works for you. I carry a Springfield XD9SC in an OWB daily under a nuntucked sport shirt. I'm a big guy - 6'2" amd 265, and I easily conceal it. Dark colors and patterns are your friend. A good belt/holster combo that holds your gun tight against your body is also your friend. Not being self conscious also helps.
Carry in Peace.
Carry in Peace.