Of all the people you know around your age who would you invest in? If such a thing were possible, who would you pick to be the most "successful" person over the course of their life? Granted, you can't just measure success by amount of money earned/net worth/etc. but it's an interesting thought exercise.
I'd have a hard time picking just one person, but I think I'd do pretty well if I could pick 3 or 4 people I know, with 20% of my allocation being reserved for someone in the future who would fit the bill. As for what characteristics I personally would look for, if trying to find the person who would earn the most money over the course of their life, well that'd be easy. I'd go for someone hardworking, always willing to learn, open minded, and able to thrive in spite of disappointments or setbacks.
What are the traits you'd look for? And do you have the same traits? If not, this is a great way to have a clear picture of what you're looking to improve upon in yourself.