The width of your hands is a personal thing where your comfy, people with longer arms tend to use wider grip on the bar. I like my hands slightly wider than my shoulders. What is important is the angle of your elbows in relation to your sides as you lower the bar to your chest. I'm a body builder but I use power lifting technique when benching to protect my shoulders.
Super wide grip flares your elbows putting all the stress on the front shoulders and rotator cuff. Not the best idea in the world.