There is a static ball park I shoot for. There is room for personal preference too. The dynamic testing is the final key and can not be ignored in optimizing the individual set-up. This being said, we must also consider morphology. A skier with a long tib/fib and short foot vs. a skier with a longer foot and shorter tib/fib will have different needs.
The static ball park I shoot for is not so much the "angle" of the cuff as the proximity of the knee, hip, shoulders over the feet. I wish I could post Bob Barnes stick man figure here which shows this relationship.
If you look at my website (http://www.snowind.com
) you will see three different animated stick figures created by Chris Geib that show the affects of different cuff angles while the skier moves over terrain swells. I think this visual will help to understand some of this stuff.
I will give you one generality I have noticed but am careful not to make absolutes about. If I see a tall person in a Tecnica Diablo boot, it is a safe bet they are probably pitched too far forward while clicked into most bindings. Remember, delta angle is a big factor in the overall picture. I tend to match skiers with shorter legs to the Tecnica and look to other boots for the aforementioned tall guy.
Can you post a photo of yourself from the side of you standing in your boots and skis with your legs in cuff neutral (equal pressure between the tongue and spoiler)? Then we can see what is going on and make observations!