Rock, one other thing you can do is to make a sketch, and have people (and by people I mean artists) critique your work and tell you which areas are weak. Post here, the artists on here will be happy to give you feedback on what is weak in your work.
I must have misunderstood your post - are you telling Rock to learn anatomy by studying manga? Or are you saying that you evolve your own style by studying said form of media?
Doctors heal you, Artists immortalize you.
"Those who can, do. Those who can't, teach" - bullshit.
The usual staples for anatomy: