I have an A+P and AI, if I had to give up ratings I would give up my pilot ratings before I gave up my mechanic ones. I fly a 737-800 and I use my rating regularly for stuff on our airplane all over the world. When I am flying as captain maint. control is very relaxed as they know everything will be handled. Even though we carry an onboard mechanic for the long hauls having an extra set of eyes makes things safer. My wife likes it too as she knows I will be out at the airport working on the airplane vs. hanging out at the bar with the FA's. I have done maint. on all the aircraft that I have flown, as for getting a job it makes it a snap. A rating and ability well worth having, it just opens up a whole new part of aviation.