Hands down, Navy Mutual Aid. I got jerked by ALL of the others (AOPA, USAA, AIG, Liberty, etc) when we got to the part where I disclosed that I was a pilot.

NMA does not discriminate against pilots. They charge the same for everyone an it is the same rate that a teacher, nurse, or anyone else with a "normal" job would be paying at their age and health.

Very happy with them.