Not sure if you were generalizing to everyone, but...
I watched the original trilogy when I was 18. I loved it. I watched them because I went to see Episode 2 (at my friends' insistence) and I decided to watch the originals to understand the story better. I later watched Episode 3 (which I loved) and then Episode 1 (which I hated). I can say, having watched all six around the same time, that the original trilogy is way better than the prequel trilogy - the only saving grace being Episode 3.
Just a few examples:
The chemistry between Leia and Han is much better than Anakin and Padme.
The humor is worlds apart - not only were the droids a lot funnier than Jar Jar (I realize the droids were in the prequel movies as well, but they weren't as prominent), but Han was funny, the whole Han/Leia/Luke "love" triangle was funny, etc...
I did not like Hayden Christensen's acting, but I also believe that a good director would've fixed that. If it's a bad take, you do it again. He was awkward and it made me cringe a few times.
So it's not that the original trilogy was cooler because I was younger when I saw it. It really was better, imo. I think if any of the kids enjoy the prequels more than the original, it's because it has prettier CG and more action.