Yes, you are right 100%! It was amazing for me to compare the pictures of 2013/2017. The improvement is evident. Congrats! There are many kinds of sports that shape the whole body. For me as a runner, I have to train the upper body and the arms separately as to obtain a entire harmonic body shape. But I confess: I like running much more than doing exercises for the rest of my muscles.
At last, dont forget to train your brain muscles ...