10-15 is about right
10 to 15 degrees is about right. As Letterman said it depends on the shape of your hull among other things. Newer boats have a tendency to be designed with flatter bottoms and like to sail flat as well. All boats at some time will start to heel so far that you no longer are presenting the optimum shape of the hull through the water. When that happens you'll start to lose the ability to control her, she'll keep rounding up on you, speed will drop off, etc. It's best to go out and try things for yourself. Take note of the angle of heel, how far you've got the tiller over or wheel turned, how much resistance there is in the wheel/tiller, where the traveler is, how much twist is in the sail, what your boat speed is, etc. Then start to make small adjustments and compare notes. I think you'll find flatter is faster and also easier to handle. At least you'll know what your boat likes and be able to replicate it the next time out. While testing try to take notes even if mental, only make small adjustments, make your adjustments in the same order so you can repeat them later on, stay organized and most of all have fun. Once you have the boat set up you can mark lines, traveler, etc so you can dial it back in the next time you're in those conditions.Mike