While I think I played Doom at some point in the 90's/early 00's, I don't really remember that too much as by the time I got into shooters, it was 3D ones on the PS1/N64 and eventually PC come 2000, but I did play and generally like Doom 3 for what it was at the time, though I absolutely had the duct tape mod. After that years later was Doom 2016, which I was actually not super interested in initially. By that point, I wasn't really into the more arcade based, enemies swarming you, type of shooters. At this point I'm more about Battlefield and more realistic handling weapons for the most part. I ended up really digging the game though, it was really solid, the music is badass, and overall had fun with it.
Doom Eternal is more of a mixed bag. In some ways, it's a lot better, I love the new gear and mobility options, the hub space castle is really cool, and I liked most of the story going on The negative is that I think the gameplay loop makes the game less fun, rather than just picking up armor, health, and ammo as you want, tackling it with whatever weapons you'd like, you now have to play ultra-aggressively, you have to use specific weapons on specific enemies to take them down at a good pace, and the kinda more explorable maps seemed like a good idea, but made the levels really boring compared to the more intricate level designs we got with the first game, which made finding secrets much more rewarding. It's not a bad game at all, but I hope for the next Doom they kinda take things back abit to what they were doing
Oh and I own Doom 64 with the PC release of it, I just haven't put more than like an hour and a half into it. It's alright though, but easy to get lost in.