Social and Combat Training are both in the lead at five votes each, closely followed by Computers at four votes, and Metaphysics at two.
Please, I implore people to switch one of their votes to Metaphysics. Social is okay (vitally important, even), and I could live with Combat training, but Computers just seems lacking compared to the other options.
Yeah, we need to learn how to work a keyboard, but I presume we'll learn that anyway in the course of standard Eva training, and I don't see how more in depth knowledge of computers and programs could help us.
Meanwhile, Metaphysics means we learn how the AT-Field works, which opens the door for AT hax. Multidimensional shenanigans (ie, shifting our AT-Field beyond our paltry three dimensions for different angles of attack, among other things) alone could mean the difference between survival and Third Impact. The study of Metaphysics, and physics in general, will drastically increase our firepower.
We're in the (albeit modified) world of Evangelion. We need that firepower.