I love Bear McCreary's main theme for Agents of S.H.I.E.L.D.  I know there are a lot of piano arrangements of "Overture" out there, but I haven't found one that works well for me.  So I made my own.

Bear McCreary has done some amazing TV soundtracks, and Agents of S.H.I.E.L.D. is no exception.  "Rocket Launch" is played during one of the lighter moments of the show, and it's a good reminder to me to appreciate and enjoy the peaceful moments we can find in the craziness of life.