OD&D - mostly sticking to the 3 LBBs from 1974, with a dash of the supplements here and there. PCs are exploring my Dungeon23 creation.
AD&D/1e - continuation of my 14 year campaign. 3 separate groups in the same world, 1 is PbP, 2 are online (though one will go back to face-to-face in late summer)
Classic Traveller - just the 3 LBBs from 1977, in a mashup of Battlestar Galactica 1978 and 2003 TV series. No 3rd Imperium elements.
My style? I like to focus on roleplay and put the mechanics behind the screen as much as possible, though AD&D tends to not support that. But I try. OD&D/CT77 definitely promote that style of play.
Star Trek Adventures from Modiphius and Dungeon Crawl Classics in the Lankhmar settings, though both groups haven't met up in a couple weeks because June is usually when a lot of my friends travel, which is fine.
I've just started playing in a 2e campaign over Discord. First time playing (as in being a player rather than DM) an old AD&D, so that will be an interesting experience.
I've been running playtest sessions of my homebrew system and touching up the language there, so that's honestly taking up way more brain space right now.
Not to dissuade you from playing PF2e if that's really what you want but neither 5e or PF2e have good mechanical support for roleplaying/telling stories, so if your reason for switching systems is for that, you will likely be disappointed.
I'm not actually switching, joining a new group. But for me roleplaying doesn't need in game mechanics roleplaying can just happen in any game. Of course I don't think I've played a system that has mechanics for roleplaying so I can't really speak to that. Though if you have a suggestion I'm always interested in looking at different systems!