I'm 35. I have been in this game for many (16,17) years.
My shoulders and arms are the bulk of my frame. I have made some thickness gains in my back and triceps. Chest is my lagging part. I superset a lot and try different exercises for chest for a little shock and it seems to help. Cable flys, dips, are good too.
6'2 265 at around 15% bf. I am working toward 11-12% range. A tweak in my diet is helping this goal, with extra cardio.
I could not live without my dumbells!!!