I enjoy both what I do and the company I'm at, which puts a clear floor on what I'll entertain. If I can't get confidence early in the process, it leads to a lot of wasted time. In practical terms, that means I invest less than an hour before figuring that out. ("I'm pretty happy here and my current comp starts with an X" often cuts the conversation off right then, which is ultimately best for both sides. It's just business.)
I won't say that I'd never consider a pay cut to change roles, but I work for money, for me and my family, and I'm going to try to maximize my and my family's happiness (financial security included).