Good question and commenting to follow.
At some point I'm hoping to be able to go down a step in my field (IT), as I'm tired of on-call and being the most responsible for everything that goes wrong. I'd like to go down to a mid-level position where I can just show up and do what needs done, go home, and forget about work. I've wondered how hard it will be to get a job like that where I'm obviously overqualified, and how to explain in a positive light that I want less responsibility.
I imagine this isn't uncommon for the RE crowd and would be interested to hear some stories on how it went going down a level or two in your field.