Testosterone Supplementation -- Good idea or bad for older men?

I just received an invitation from a major Boston medical group to participate in a study of testosterone supplementation in older men. I had a complete blood-work done 6 years ago, and my level then was within the normal range for my age, 635 ng/dl. The study wants men with a low T. rating. Don’t know if I now qualify or not. But supposing they test and I do. Is supplementation a good idea?

I remember that giving post-menopausal women extra estrogen was all the rage some time back, then we began to learn that it might be causing more harm than it was doing good. There is something to be said for aging gracefully and just accepting the fact than in my late 60s, I am not the same man I was in my early 30s and that’s actually OK. That is how nature designed it.

What do you think? Do it for the benefit that may come to scientific knowledge and whatever benefits it may give me in extra energy, less need for noontime naps, and renewed sex drive (As if I need a ton more of that!)