I would be faster. Faster at practicing. Faster at reading. Faster at learning. Though I'm already good at all of those things and faster than most, but not as fast as (he's an actual genius) so I would choose to be faster. Not to keep up with him but because that's all that's missing for me. But I can manifest anything I want really. If I want to be faster, I would just practice being faster so perhaps I don't really want that. But it was the first thing I thought about to answer your question lol.
What about you you didn't say what talent you would choose???
RE: What talent did you want to have?