For me it’s first person puzzle games. I can think of maybe a dozen off the top of my head that came out in the last decade. I especially enjoy when they’re open world. The ability to just quit a puzzle that’s stumped you and go try something else for a little bit is incredibly refreshing.
Have you played the two most recent deus ex games? HR is my personal favorite but I liked MD more for its atmosphere and level design. Both are primarily 1st person but switch to 3rd person when using cover.
I have, though even MD is getting on for 7 years old now. I don’t think that the series lived up to it’s roots in either title. I found myself feeling very constrained by them; I don’t necessarily mind if I have to play a character (Corvo is great as a Tabula Rasa) but Adam Jensen and his backstory are so fundamentally unlikeable.