Yeah, a lot of my disabled friends (physically and mentally/cognitively, including mental illness) say that their disability is a gift. Not that it doesn't have negative or annoying aspects; more that it is part of their lives, they've had interesting and valuable experiences that they wouldn't otherwise have had. I agree with them not just about my autism but about ADHD and even major depression. You often don't realize it until you look back on it, but even extremely painful experiences can add to who we are. I think I'd rather have a history of depression and the constant threat of a relapse, than be unable to understand what it is like when your own brain doesn't let you concentrate or enjoy anything, when you start to wonder how much it would hurt to jump in front of a semi truck. Knowing I've had that experience multiple times, and survived, means that I can tell others that they can survive too, and know at least halfway what I'm talking about. It means that every time my own symptoms come back, I can remind myself that I've been there before and I can get out of it again--that I can survive, that there's hope, because logically, if you've been seriously suicidal four times and all four times recovered and went on to enjoy life, doesn't that mean that odds are you'll go on to enjoy life after this episode too? Realistically of course I do not want to ever have another episode of depression, but I know I can survive if I do. It's something I'd never have learned about myself if I had never had that experience.
I don't consider disability to be either positive or negative, though. I don't have any illusions about being particularly special or superior because I've had these problems and many other people haven't. Rather, I feel that it is an important part of my life, part of what makes me who I am; it's a neutral part of the world. Being "normal" in terms of the people around me would, for me, be abnormal. There are many ways to live life and most of them--including life with disability--are as acceptable as any other.
I don't want pity because I don't feel there is anything pitiful about my life. I don't want to be called inspirational because I am not doing anything inspirational. That's not modesty; it's a simple statement that solving problems is part of life as a human being. You live with a disability not because you're heroic or inspirational, but because you have your life to get on with, things to do. Just like anyone does.