Same. I think that the best thing one can wish for is a way to learn things you want to learn as fast as you want to learn it, whether that thing be knowledge, or a skill, or a power (supernatural or not), with the immediate option to unlearn that thing, should any ill effects or undesirable outcomes occur.

That way, your potential is essentially infinite, but not ludicrously so such that the world gets boring, and that any changes are not sudden or dramatic.