As above.
Do you have a passion?
GD at its finest tonight.
Maybe a serious answer?
Whatever, mods feel free to close.
Yes. Computer science. It is the defining academic subject of the information age. Progress in computer science drives pretty much every other field forward and it has significantly changed the lives of everybody in the civilised world. I find the methods employed to be extremely interesting and the subject has a vast practicality in almost anything you can think of.