Conservative vs liberal approach to law
The characterizations we most commonly hear in contrasting liberal and conservative judges tend to use phrases such as "activism" vs. "restraint," and approaching the Constitution as a "living document" vs. focusing on "original intent."
However, I think asking a more fundamental question sheds light on why our society's most vulnerable _ the poor and otherwise disenfranchised _ need conservative judges. We should be asking: "What is the purpose of the law?"
In this sense, I would contrast a conservative-vs.-liberal approach as the former viewing the core purpose of the law as individual protection and the latter relating to law as a tool for social engineering.