I like to shoot what I can draw easily. By that I mean extend my bow hand out to the shooting position and then slowly and smootly draw the bow. No shaking, no starting at my chest and pushing the bow out, and no having to point up in the air to draw it. I also believe that I should be able to do this multiple times, not just once. What happens if you draw, have to let down and then can't redraw the bow without making a whole bunch of movement and noise?
Had a very good teacher tell me once, "You and a professional are capable of getting the exact same results; the only difference the professional can do it repeatly and makes it look easy. If you can't make it look easy, then you haven't been practicing enough."
Just FYI, I used to shoot a 45 pound bow. Now I am up to a 60, although I think the shop turned it up to 65 when they replaced the limbs. They swear they didn't. It is easy to shot now even after a few hours of practice, so I might step up to 70. Maybe someday I will get up to 100, but I bet I will be 70 years old by then and have to shoot everday just to be able to keep the draw easy.