For the aesthetically-minded trainee, your diet will disproportionately impact the results you produce far and above any training or supplemental protocol.
Training is certainly a factor and some exercises will bring more bang for your buck but generally when training with weights (or body weight) you are performing a variation of pushing, pulling, squatting, or carrying.
Stimuli can be produced with a variety of training approaches, some being better than others but where the real results stack and compound is when optimal nutrition is observed.
I have seen many people in commercial gyms with aspirations of an aesthetically pleasing physique doing incredible amounts of training with weights and cardio only to fall short because of not getting a handle on their diet.
In fact, most gym-goers needn’t build very much muscle at all to achieve their ideals.
Most males would look absolutely fantastic with a beginners increase of 10-20 lbs. of muscle mass and then emphasis on obtaining/maintaining a range of 8-12% body fat.
There are times due to workload, life etc. that I only get a couple brief training sessions in per week, but because of building a solid base of strength training I hold a muscular base that will stay with me despite irregularities in training frequency and intensity.
A good solid training protocol that is followed for a couple of years can deliver 90% of the muscle you will ever need as a natural athlete.
The secret lies in nailing down that diet and it need not be a tortuous regimented six-eight small unsatisfactory meals per day.
Calories are and always will be king, so adjust your caloric allotment based upon your activity, enjoy the foods that you love and keep nutrition as the utmost importance in your aesthetic pursuits and you will enjoy the rewards!