Sounds like a lame topic and probably my choice is lame too, but mine is a very simple one. I would love to be able to type something like 200 words per minute! You see people type not looking at their keyboard, writing code, trouble shooting and their fingers are just flying around the keyboard.
Wouldn't mind a photographic memory...
It depends on how many such pills are available to the rest of the world. Because if everybody had access to such a pill then it would make it pointless because so many others would want the same skill.
However, if I had to pick I would choose the ability to predict or forecast future trends in the Stock Market. Think of how rich someone could become if they could pick winners in the market with a really high certainty.
That is the problem with free college for everyone. Once you give it all away for free then it loses it's value and cheapens it for everyone who came before and struggled to make it through.
If I could take a pill it would be to be able to have incredible planning skills.