Turbo
You have unlimited speed, but cannot slow down.
Dream Walking
You can physically enter the dreams of other people. Drawback is you could become trapped by a powerful enough dreamer.
Wisdom
You have unlimited wisdom, but you are unable to apply that wisdom on your own. You can only tell others how to apply your wisdom, if they'll listen.
Etherealness
You cannot touch physical matter nor can you be touched by physical matter.
Immortality
You can't be killed unless beheaded.
Shape Shifting
You can assume any real form, limited only to your imagination and creativity.
Love Magic
You have the power to make anyone fall hopelessly in love with you. The person will obey your commands. (Confessor from Sword of Truth series)
What Girls & Guys Said
Opinion
0Opinion
None of them are really appealing for a number of reasons.
Unlimited speed is probably the worst one because just imagine traveling at just under the speed of light. Encountering a single grain of dust weighing practically nothing hitting you in the chest has more power than a nuclear bomb and would disintegrate you.
Etherealness is equally bad because if you need a surgical procedure or even an injection, the needle cannot penetrate your skin.
I certainly would avoid love magic at all cost because I am not interested in being in love. That is something totally unappealing to me.
The one with the least drawbacks would be shape shifting. I have a pretty vivid imagination and I would probably chose that one if I was forced to.