There's been some pretty grim stuff on this thread.
Old age comes to all of us eventually (some of you seem to have had it fast forwarded), but rest assured all of you, it's heading your way sometime.
Myself? I've been absolutely blessed with my health. A few broken bones and no illness more serious than flu. The usual back pain for an old guy but not unbearable. No (so far) warning signs from my liver or lungs after the abuse they've received over the years. Out on the bike, 30-40 miles no problem. It seems from reading through the comments that I've been extremely lucky.
I'm retiring this year, so, in the finest Scottish tradition of doom-laden optimism, I'm looking forward to seeing out the first 12-18 months of my retirement sitting on a park bench, tartan rug over my lap, thermos flask at hand, cardigan, scarf, bunnet etc. . . . and then receiving the news that I've got two, maybe three months to live.
Aye, I'm a cheerful b*****d.