One of the pieces of advice that we give at YC is: try to work together on a project rather than just doing an interview.
. . . if use is not an appropriate criterion for decision making in the academic life, what is? Love. . . . The virtues of love as a criterion for choosing a college major. . . it is not pretentious. "Use" is pretentious because it claims to know something about the future that it doesn't really know. Love is immediate. . . [love] guarantees that you will work to your highest potential. . . it is part of who you are, and not just something you think, often wrongly, that you can use.