MORGAN! Kidding. I mean, it is technically, but for the alphabet challenge M is for Music.
It's rather amazing how music can make so many emotional ties to different things in life. I listen to everything because I need different music for different times, situations, and emotions. One new artist I discovered is Lissie, who does an awesome cover of Kid Cudi's "Pursuit of Happiness". Music typically gets me through a day. Music can also influence buying habits. It can show emotion at important events. It can make you happy, sad, mad, anxious. I wonder if people thousands of years ago saw this coming.
One final note: Just for added emphasis, I like to blast "Friday" by Rebecca Black at work when tours of new students go through the building. Never gets old.