There are so many of these types of movies I wish I could watch for the first time. This is one of them.
You asked a pretty question; I've given you the ugly answer.
Fasten Your Seatbelts….
It's Going To Be A Bumpy Night!

I caught the ending on tv when they’re in the car driving to the desert and had no idea what was going on.
Melton1 Wanted for Pedophilia:
https://i.ibb.co/6cnPmJVr/IMG-0830.jpg
https://m.youtube.com/shorts/Zjxk307CND0

It was during my compulsory army service, back in 1998, it's been a week of holding sentry in a remote rural woodland area. It was scary to go at night after watching this.
The scenes of murders were very graphic and not seen before in the movies.

I had an extremely visceral reaction to this movie, it was insanely powerful, I recommended it to all my friends but nearly twenty years later I have still not watched it a second time.
Only other movie to get to me like this was "Audition" Japanese movie that starts lightheartedly creepy then goes WAY dark.

This was undoubtedly the best first time movie watching experience I've ever had. I'm a sucker for a great plot twist ending, and they don't get much better than this. It's also a rich enough movie, that a second, third, fourth viewing are still very enjoyable even after you know how it ends.
Among the best modern movies made, and perhaps the finest murder mystery ever made, in my opinion.

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Hah! I too saw it at my Uni cinema club (London art college) but I'm guessing we didn't go to the same Uni, as my 60-odd seat cinema room was almost empty - maybe 8 other people? - which made it all the more spooky, tense and engrossing. I chose to go on my own, too, so no friends around to distract me. Pretty much the perfect viewing experience for a film like this - you want the big screen, you want the cinema setting, but you don't want to be totally alone, yet you don't want to be "with" people exactly either, so the intimacy of the tiny audience made it utterly sublime, a priceless memory.
I also remember looking at the opening titles with a half-critical eye, the visual artist in me thinking "that's a really good job they did with that". The rest was even better, of course.
"It's too late Always has been, always will be
Too late."

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Luckily I knew almost nothing about it before watching it, so I remember just being glued to the screen on my first viewing.
You want something corny? You got it!

The sloth scene was terrifying upon first viewing, when it moved!
-?
https://m.youtube.com/watch?v=uhyfVEVY_oQ
"I am I am I said I'm not myself. I'm not dead and

The media did a great job of not spoiling the killer secret in the commercials. Also, the internet isn't what it is now. I was shocked when KS was outted as John Doe. Made me look at him differently. Took me a couple of years to like him as an actor again. The movie really freaked me out. Saw it in the cinema.

I could write a book about the circumstances leading up to my 1st viewing of Se7en. Good times in 1995!!!
If you're one of those idiots who needs to feel good, go get a foot massage.

I wish that about many films. 'Empire' most of all. I still do remember first seeing Se7en. The 'Sloth' scene was genuinely frightening, and I'm not often scared by movies. Especially horror movies with a supernatural element. Nightmare on Elm Street, Friday the 13'th, Halloween. That's not scary. Psycho was scary. Texas Chain Saw Massacre was scary. Silence of the Lambs was scary. Those things could really happen. For all anybody knows there could be somebody that twisted and that demented out there. Therein lies true terror.

You will have to understand that 'splosions and other cgi-heavy movies were not all the rage back in the mid-1990s. So, you would have to do without such eye candy. This is a drama-triller movie. You are expected to use your own brain and come to your own conclusions as to what the intentions of the serial killer was, during the watching of the scenes. The ominous feel of the movie surely is better than most modern movies.

I recall renting
Se7en
many years ago, and that's about all I can recall, other than a few scenes and the "twist" at the end, such as it was. It didn't have much of a plot. Granted, Fincher did all he could with a mediocre script, but I still won't forgive him for the embarassing and unwatchable
Aliens 3
.
And what a waste of Gwynneth Paltrow's talents. I am continuously baffled by
Se7en
's high ranking by IMDB users here.
Has the average IQ dropped while I was away?

yep, just saw it now for the first time. kind of a disappointment
Your first word in response to the OP is "yep" yet you're not in agreement. This leaves me confused.

yep, just saw it now for the first time. kind of a disappointment