Here's a unique answer for you:
Hard Edge
AKA T.R.A.G. in the US, it's a fixed camera angle game with puzzles a la Resident Evil, but the setting is futuristic and much brighter/lighter in tone. It also matches if not beats RE1 at points for bad VA. It's also janky in places, lacking polish. So why do I like it?
The gameplay is a good start. You can swap between 2 (later 4) characters at will, each with their own movesets (1 has guns, 3 are varying melee sets), capabilities (one small enough for a vent, one strong enough to push things, etc), and your choices impact how the game plays out from the very beginning where your 2 characters split up, with you choosing who goes where.
If you make certain choices in the story, you can also unlock extra weapons that play differently.
There's also the soundtrack, which I'm fond of (playlist link, skip through and hear the variety):
I'm not saying it's my favourite game on the PS1, but I'm still fond of it after 25 years. On PS3 I bought it from the Japanese store and played it in Japanese because I don't have any of my old PS1 games.
Speed run: