When most people vote for one category, voting for more than one makes a mockery of the whole process and just makes it even more pointless than these polls usually are. Better would be to ask people to spread ten votes around the places they feel they have more focus on. Those that have a single point of focus could put all ten votes on that, people like me could spread them around accordingly.

To accurately reflect my "main focus" I should vote about 15 times for math and then spread votes liberally around the others. Instead I shall abstain.