Understand that stem shape isn't arbitrary. You don't just 'put it on.' It's the place where all other lines of the boat must meet fluidly, and so it's determined by the overall shape of the hull. This stem shape is a key to unlocking the code of what you can expect from a hull. Seeing the 270 Bowrider for the first time, I expected a roomy bow, not just across the gunwales, but lower, at the cockpit sole level, with more knee room between the lounges and deeper, wider stowage beneath those lounges than boats with concave stems. A spoon-shaped stem results when a boat's topsides are convex as well. This outward bulge, called flam, is the opposite of flare, a more commonly understood feature. Flam provides more width below the sheerline, room where you can use it.