E. Transfiguration though it would depend on if it applies just to oneself &/or objects and what it would be limited to. if it grants the ability to alter oneself as well as objects then i'm all for it.
it would be fun to fly into a church with giant bat wings and turn a police station into a building made of copper slices of bacon or a few fast food restaurants into giant salads. though i'd be way to tempted to turn the white house into a giant marshmallow...
it would also help with keeping clothing and everything else in the house clean
upgrading
dealing with that one guy no one likes

and those times when you just can't seem to find a bathroom
now if you where trapped on a out of control train with someone you found attractive that was packed with enough explosives to level a few city blocks that was gonna run into one of two stations and you knew that one of the stations was empty of everyone except a family member you cared about & the other had 15 complete strangers in it and you where given the choice direct it to one or the other, would you chose...
A. the station with you family member in it
B. the station with the 15 strangers
C. sit back and hope someone manages to save everyone
D. get intimate with the other person whether they like it or not.
E. trigger the explosives