I, too, have been making Quilts of Valor for 5-1/2 years, attempting to make one a week. Like quilttinger said, it is very rewarding.
I received the most meaninfgul thank you note from the medical staff in Afghanistan, wherein they thanked me for the beautiful quilt and added that it was draped over the soldier when he received his Purple Heart. I hadn't thought of the Purple Heart thing before but the message really tugged at my heart strings. Yes, this is rewarding work and as long as I'm able. . . . . .