Oh, I have a lot. The little things are what I enjoy most about games.
-Interesting credits, e.g. Smash Bros, instead of a long, scrolling wall of names you don't care about, e.g. Assassin's Creed 3.
-Walking through water makes your character's clothes wet, e.g. Uncharted.
-Blood sticking to you, e.g. Dragon Age.
-Camera freedom. Planetside 2 lacks this in vehicles. Chivalry doesn't even let you look straight up. You usually can't turn the camera in isometric games, even when everything is 3D--one of the only qualms I had about Torchlight 2.
-NPC banter. Bioware RPGs have been mentioned, but I like banter not only with squadmates, but between everyone in the world. Metro 2033 does this beautifully. In contrast, the lack of this is what made GTA 4 feel a little dead to me.
-NPCs acknowledging things about your character, especially when s/he's customized, e.g. Skyrim (though "An archer, eh? I prefer the sword myself" is just slightly off-setting when you're running around with a sword and no bow in sight).
-Characters gesturing as they speak, like Half-Life 2 and Rage. Mass Effect desperately needed this.
-Nuances in character's facial expressions, or facial expressions to begin with. In Left 4 Dead 2, I would just stop and sit around watching my companion's faces as they spoke. And in Mass Effect, though it needed much more, I loved when I gave Kaiden a compliment and he smiled, just a little.
-Player characters with a voice and a personality. I don't like playing a blank slate if I can't choose what to write on that blank slate (Skyrim). I love it when Jason Brody comments on what you're doing in Far Cry 3. I love it when I can essentially choose a personality, like in Mass Effect.
-Good physics. This is the only reason I like GTA 4 more than Saints Row 3.
-Messing with dead bodies. Kicking dead people around in Saints Row 3 was fun, and using them as stunt jumps in GTA was awesome.
-When NPCs seem to have their own lives and concerns and don't just revolve around the player. Though I hated having to chase people down in Mount and Blade, I appreciated it for what it was. Sui Generis looks like it could accomplish this as well.
-Weapons with weight, especially swords. Chivalry does this extremely well. Skyrim does not.
-Location-based damage. Fallout 3, New Vegas, and War of the Roses are the only ones I can think of so far, though I haven't played every game ever, unfortunately. I'd love to see a game where hitting someone's leg actually made them fall and have to crawl.
-Good mod support/lots of mods. You know something's been done right when you can't tell the difference between Skyrim and Second Life. [http://static.skyrim.nexusmods.com/images/5244670-1362711876.jpg]