It's all personal preference. Depending on the sort of law you are interested in, you might want to pick a large city (for corporate or tax for example), but other than that, it's really about what you want.
I've lived in 5 states so far (CA, VA, MA, NY and now MI) and I still don't know where I will end up living permanently. Each place I have lived has had both good and bad aspects to it. My husband and I are in MI for 2 more years, and then we'll see where he gets a job. I'd love to go back to Boston, but we're also looking at NY (friends and extended family there), NC (where my parents are), UT (where his parents are), TX (doesn't snow!) and pretty much anywhere else. We're really flexible about where we live. I do know I want good schools, lots of cultural activities and great food. But we've found that almost any place has a lot of things we like.