I took Tae Kwan Do during my teenage years and in my adult life I migrated towards mixed martial arts. I prefer mma for the simple fact that, to me, I see more practical application for many of the moves taught over what I learned in Tae Kwan Do. It's generally a little more expensive, but in my experience it's worth it.

Definitely continue your research and consider why you want to learn (discipline, self defense, exercise).