As a gamer I prefer gameplay to graphics.
Heck as an "old" gamer, I sometimes play some of my old terrible looking favourites just because I like the game play.
However... As a hobby engine programmer I get really excited by graphics technology.
The first 3d games that I played (Wolfenstine and Ultima) made my mind explode. I had to figure out how they were made!. It resulted in me learing alot of math, and building several software based 3d engines. By far, this is the reason I am a programmer today.
So there is nothing like a cool programming technique to get me interested a game.
These are the games that I played that really geeked me out when I saw them.
When I call them "first", it's the first games I saw as a kid. It doesn't mean they are the first to use a technique.
Wofenstein: First "3d" game I played
Novalogic's Comanche: First time I saw voxel graphics (it was beautiful!)
Seventh Guest: First fully rendered, fully animated environment. (This made me learn 3D modelling software)
Quake2: First 3D game I ran with H/W acceleration
GTA 3: First game with Seamless 3D open world
Doom3: First game with modern lighting techiniques
Crysis: First game with modern shader code.
These games are not necessarily my favourite games to play. But as a programmer each of them cause me to pick up a book, or create my own version of these games
Unfortunately for my programming self, most games today invest in "art" rather than graphics. They create bigger and more impressive set pieces, but I haven't really encountered any revolutionary rendering system that knocked my socks off.
I sort of get the feeling that the 3D graphics revolution is over. We are now more limited by what artists can create, then what the computer can render. Ex: Creating realistic faces today is more about putting in the 3D modelling work then inventing new rendering techniques.
This nvidia demo from 2006, looks good enough today (12 years later). The reason most games don't look like this isn't because of missing graphics tech, rather it's because it requires a daunting amount of artwork.
So I think since DX10 (when the pipelines became flexible) we are at an age where art is more important than graphics.
This is sort of reminiscent of 1990s CG movies like Terminator 2 where viewers flocked to theatres to see what the latest CG could do. Whereas today (I'd say since ~ lord of the rings) if you notice the CG it means that it's bad. I actually liked these parts in the "Last Jedi" where they where CG'ing the admiral and the princess (badly). It made me feel like a kid again. And someone was finally taking some risks with some new graphics technology.
I am tempted to say that no more GFX revolutions await us in gaming. But I wonder what will be the next revolutionary tech? Fully ray traced games? Something else?
I personally have not gotten excited about a game engine since "Crysis"