@Bill,
If it's regularly much more memorable and intense than regular, it becomes the regular, and is no longer much more memorable and intense than regular.
The key to intense, memorable orgasms is not just the orgasm but the rarity and emotional heft of the context: makeup sex after a gigantic fight, reunion sex after a long time apart, orgasms she's trying to hush up because her parents are the next room over and the walls are very thin, orgasms you're giving her outside in public where other people can hear her, exhibitionist orgasms where people are watching you, cuckold orgasms where she's cuckolding her man, etc.
But you can't make it a regular thing, because as soon as it becomes a regular thing, it stops being unique and memorable.
The first time you bang her on a Ferris wheel in front of a cheering audience while her husband grumblingly looks on, she may enjoy a very intense, memorable series of orgasms. Do that every weekend however and pretty soon it's just another typical way for her to get off. "Sigh, okay, I guess we can do the public Ferris wheel cuckold sex AGAIN this weekend...!"
Anyway... I suppose it's possible to be "The Guy Who's Always Chasing Memorable Orgasms", just constantly trying to engineer these unique, explosive situations... they are fun when they happen, sure... but it is kinda going to have to be a mini-life mission if you want to have lots of those.
Some people do that by having bang goals... "have sex in each of the 50 United States", for instance. I guess in that case each one is memorable: "Remember Oklahoma? Boy, that one was a hoot!"
Memorable things are memorable though because there aren't that many of them. Most women aren't going to be able to sit there and spool off for you "my 35 most memorable orgasms all-time", etc. She can probably name 5-10 tops unless she lives and breathes sex.
Chase