When selecting breeders & showing turkeys, stance and breast fleshing are the two key points I look for. Colour is really the only trait where I may deviate from show standard when selecting breeders. I don't eat the feathers and only 1 bird needs to finish first.
Here's what I look for, in no particular order of importance:
1) Outline of turkey in Standard is excellent. Pay attention to angles of back, belly, and chest. Pay attention to depth of body and fullness of breast. Birds not displaying are preferred for judging.
Back angle is of particular concern as it's an indicator of overall fleshing. If too low, you have too much fleshing and most likely fertility issues. Too high and not enough breast muscle.
2) From the front or rear, look at the shape between the legs between the ground and belly. Shape should be more square than skinny recctangle. Definately stay away from trapezoids.
3) When being evaluated on the table, the breast muscles must be more prominent than the breast bone. The thick muscling should extend right to the tip of the breast bone.
Breast line and backline need to be parallel. Breast line should not slant towards the back and point to the pelvic bones. I like to be able to fit my entire palm width between the end of the breast and the keel bones. This measurement influences growth rate.
Anyway, this is all in the SOP, just worded differently.
Good Luck