Play what you like best. I believe mid vs. MP is only a part of the equation. Stiffness, swingweight, balance are probably more important. Just like MP's, mids differ a lot among each other. Some have quite a lot of power, like the K90, some are rather anemic like the Redondo mid. Some are good flat hitters like certain prestiges, some are quite spinny like the PB10 mid.
"Most of us believe in trying to make other people happy only if they can be happy in ways which we approve." Robert S. Lynd