it is very intresting that you say all this.. is this just a predisposed body type? All the things you say are very accurate in describing my strengths. Also your suggestions are spot on.. exactly what i have learned over the years.. I have had alot less shoulder pain after switching my shoulder day from the day after my chest workout to five days after my shoulder day. I was wondering about the bicep development issues. Why is it that development is not as good as numbers would suggest? would isolation excerises be better for development for this problem?
It may be the result of a taller or ecto type individual but common among many guys who focus on weight rather than form, which is many people myself inlcuded at one point.
Keep in mind your body is an amazing machine that independent of your bodybuilding dreams, uses what it has to most efficiently accomplish the task.
It is up to you to interfere with the neurological and physical factors causing this repeating pattern.
As for the Bicep issue...
When performing bicep barbel curls it is imperative that you have your upper back and lats flexed to hold your shoulder joint from rotating unnecesarily and comming forward. It is likely that your lats and upper chest also facilitate a very strong bicep curl esp at the top of the movement.
Heres how i set up to limit unexpected/unintended cheating...
Feet shoulder width apart,
Slight knee bend so that at the top of the lift your arm arc still has you working and limits the elbow moving forward.
If you try to curl all the way up, while standing stright up, your upper arm (elbow to armpit) almost has to come in front of your body to allow this range of movement.
Instead try to keep your elbows beside your body until the very top of the lift to cinch up the bicep, and with this the upper arm movement should be still very limited.
The bicep is responsible for curling the lower arm (forearm and hand) as well as lifting it. SO incorporate a slow twist from top to bottom.
To be continued... heading out right now.