Keeping in mind that I come from a Social Inquiry perspective:
Australian History & Politics: Can be fairly dry, but I learnt some useful things.
Political Theory: I absolutely adored this subject, possibly because I was in a good tutorial but I just found it really fascinating.
Social Theory: Great if you're into that sort of stuff, but if the mere thought of Foucault and Bourdeiu makes you want to die, probably not a good choice.
Communicating the Social: DON'T DO IT! One of the most painful experiences of my life, including CIE and MIS.
Psychology: I really enjoyed this subject, mostly due to the lecture skills of John Carr, I imagine if he was my tutor rather than the batty woman we had, it would have been even better...only downside was John's fondness for the in-class exam!