34 and I definitely feel like my ability in competitive shooters is getting worse, im finding I lose quite a few 1 vs 1 in Apex just because I'm missing my shots at times. When I was younger more often than not I would have made those shots (I was a very good at Halo, Unreal Tournament, Gears of War and even COD in my twenties).
On the plus side I do feel I'm a smarter player now, relying more on tactics to get the drop on people and timing my fire fights whereas I used to rely on reflex and aim.
Regarding solo games, I still tend to play normal difficulty as a first playthrough but I'm generally far more chilled about things like challenge, my game time is more limited these days so I'm just looking for the odd hour or 2 to have a bit of fun
For me this was Mass Effect 3, specifically the multiplayer. Amazing variety of characters, weapons, maps and enemy factions and an incredible community. Played that game on and off for near 10 years, only reason I've stopped is that the majority of players have moved on and the game just isn't the same without the community of players I used to play