My old Martin has been through the wars. I wouldn't get rid of the ol' girl for any amount of money. She's not the best sounding guitar anymore, but there'll never be another that touches my heart the way she does, and when I have serious writing to do, that's the machine I do it on.
I felt a bit like that when I played a Telecaster, but I wasn't good enough to bring out the soul of that guitar. The Martin however . . . .