Roger, I'm probably one of the few folks here that not only was shooting 40 years ago but still have all the negatives and contacts numbered and filed. Over the years I've tried new cameras, films, and techniques. I've shot studio stuff and learned lighting and view camera techniques because there were bills to pay.
When I look back over the journalistic stuff I shot in the 60's and 70's and compare it to what I'm shooting now, just for fun for the most part, I think that the same "me" is very obvious in both groups of photos. I still have a penchant for the widest lens available~ 19mm Canon then, 15mm Heliar now ~ B&W film, rangefinder cameras, similar compositions, the same kinds of available light. What has changed are the subjects. They mostly tend to be a lot older now. On the other hand, when I'm shooting younger folks, they're often dressed like their grandparents were back then. Faded jeans, shaggy hair on the guys, long straight hair, too much eye liner, hip hugging jeans or miniskirts on the girls. They even listen to acid rock! Who could have imagined that The Doors, Cream, Pink Floyd, etc. would still be getting radio play, or that 20 year olds would be jealous of me because I still have the original vinyl. And it's also amazing how many of them see me and say "Ooh,that's a Leica!"
I'd love to meet some college girl who's grandmother I once photographed. It would be interesting to go around with her to some of the same locations where I photographed her grandmother way back when...