I was playing D&D 5e up until January. Then, with the OGL fiasco I decided to try learning Pathfinder 2e. I have been playing through the Beginner Box for that and I like it a lot more than D&D already!
I'm playing 5e; it's my first RPG. I've wanted to play D&D for most of my life and got a first group together about 6 months ago. Loving it. But I'm very interested in other systems in the future.
PF2e seems great for being similar in style, but having a deep tactical system for combat.
Star Trek Adventurers excites me for giving me a system to be a part of my favourite universe. I've always wanted to be in Starfleet!
And on a very different side of the spectrum, Fate seems to be a game that takes all the tactical RPG elements and throws them out, leaving just the juicy roleplay, characters, and world building. I wonder if the absence of any solid system will leave it a little... "vague"... but I think it would appeal to some players.
The other nice thing about PF2e is that Paizo is a much better company than WOTC. I have trouble supporting WOTC after all the awful stuff they've done, especially in the last year. Paizo makes the entire system free and open, so you don't need to pay for or pirate material in order to play like you do with 5e.
Of course, it does help that PF2e feels like a more fun system to me (as a DM). My players seem to like it more too.