I am not sure what the criteria of saner would be. I certainly would not want a T who is actively in the middle of the exact same problems I want to work on with them, unresolved. For example, my biggest issue was addiction - I certainly would not want a T who is in any active addiction, especially in denial. Or anything that affects their perception, judgment and morals in negative ways, like my first therapist. I would not expect them to never experience some anxiety, depression or grief, for example, as I think those probably affect everyone to some extent during a lifetime. What I would primarily want is competency and good work ethic. I also don't really want to hear about the T's problems, I don't get anything productive out of paying to commiserate.