Basically, I just adore Glenn's look. The wavy, mussed dark, longish hair. The handlebar moustache. The open-necked loose shirt and the tight blue jeans. I love that style in general - it would make me take a second look if I saw a guy in the street dressed like that - and in my opinion, it really suited Glenn. He looks young, confident and masculine - the lazy, casual rock star. Speaking about this picture specifically, I love his stance, the way he's focused on the guitar, and there's something cool about the way he has his back to the audience. It's a young, hot guy up on stage, drenched in sunshine, playing his guitar, watched by thousands of people - basically living out his dream. It's a great, dynamic shot.
I think Glenn looks absolutely gorgeous here - sexy, passionate and masculine, but in a different way. I don't tend to compare the two eras, because I can't. It would almost be like comparing two different people.
I guess that '70s look on Glenn just does something to me. The Hotel California pictures, for example, literally make me swoon. He exudes sex appeal - the rugged, tousled look has always appealed to me. I also think that, whereas you say you find it difficult to apply feelings to pictures that were 'before your time' (which I can appreciate), that element actually adds to the appeal for me. I wasn't around in the '70s, so pictures like this allow me to indulge my fantasies! Rightly or wrongly, given the often bland music scene nowadays, that era seems so exotic and exciting to me. Pictures like the first one encompass all of that. That's the best way I can explain it.