I've been DMing most of the time for the past 20 years (mostly a player for the 10 years prior to that). Once in a while, now a day, I get to play, and I really love it. I think both experiences give me something different.
When I DM, I'm always in action, and I prepare more in-between games, which keeps my head in the game. The power/control is addicting but also sometimes draining.
When I play, I try to immerse myself, and I can really escape into one specific character and enjoy myself without feeling the weight of the world upon me. Unfortunately, when I'm used to DMing, sometimes playing seems less stimulating because I am not involved in every decision or action.
I used to play baseball as a teen. In a way, being the DM is like being the pitcher or catcher. I'm in on every play. Being a PC is more like playing one of the other positions. Once in a while, I get to make a play and affect the game. Sometimes I have to back up the play, and sometimes I just have to watch and encourage my teammates. Although the roles are different, they are all enjoyable to me.