Does it make a lot of difference what law school you go to?
Yes.
Given that answer, is which law school you go to the most important decision you have to make?
No.
The most important decisions you have to make at this point are the ones addressed in the previous eight chapters. After analyzing yourself, your talents, your desires and ambitions, and applying that analysis to what you’ve learned about the legal profession, you have to make the much more important decision of whether you want to be a lawyer. There is no law school on earth (and of course there are none in heaven) which, by virtue of admitting you, will make a bad career choice a good career choice--though, as discussed in the sidebar "The Troika," there are three very narrow exceptions which, for some, give that last statement the lie.
If law school it is, though, anyone who tells you it doesn’t matter where you go--well, maybe you should tell him where to go. It matters, regardless of your plans and ambitions and sense self-worth. It matters despite the fact that the academic offerings from law school to law school differ only in a handful of ways. And it matters even though in some cases it shouldn’t.