I do not like porn movies at all, neither old nor new, cuz me in general not fond of watching porn video. So, all the difference about plot lines does not matter for me. I prefer photos. And when it comes to photos, I definitely choose "newschool" (from mid 90-ies till nowadays)
I really love music of 80-ies. But I do not like women style/fashion of 80-ies. And the photosets that I saw from that period of time were not as nice as new ones. I prefer modern concept of beauty, rather then "more natural" women of oldschool porn. I put it in the quotes, cuz this definition sounds questionable to me. And the more questionable is the contraposition of naturalness of retro pornstars and new ones.
Because there are hundreds of natural girls in porn today!
I am surprised to hear about newschool plastic "barbies"... Silicon? Yes, I hate it myself! I can't stand boobjobs, but luckily there are many girls with natural tits nowadays! Please, show me the reason to blame modern pornstars of being unnatural? Or maybe unshaved pussy is the only criteria of naturalness?
I do insist that a large amount of european pornstars nowadays is very natural. Sometimes, when watching oldschool photosets I feel like under the term "natural" people mean average-looking girls with ordinary faces and untrained bodies... but IMO this is not naturalness. It was a time when I was searching for any Rodox, color climax, and stuff like that, cuz I was just curious to find some oldschool girls that were sexy... but most of that photosets from 70-80ies looked like an amateur porn to me, cuz bodies were very average and plain, girls acted kinda shy (or looked like that) temperament of the pornstars was different, more mild - it is kinda obsolescence to my mind, and the action is not as hot as in a newschool, new stars are more lustful, the action is more defiant and blazing. And as for me, I really love that nowadays in porn there are very sexy girls, sometimes much more good-looking and sexy than mainstream celebrities and "sex symbols".
In general the supply of different girl types involved in porn industry nowadays is much more wide than it was back in the days. Variety is bigger than ever! Due to the internet you can always find any type of the body/face/color or whatever else turns you on.