Law and Ethics is my other area of common visitation. I also answer general questions in a number of other subjects, but R&S and L&E are my two main forums.
Parenting and Languages. For me, Languages is for serious answers and sharing knowledge, Parenting is for giving and asking for advice or sharing opinions and R&S is for fun.
Environment/Global Warming to laugh at the GW deniers
Science and Mathematics (hence me being a top contributor to Biology) to explain evolution to those who actually want to understand it and answer genetic engineering questions.