Games are using HUDs less and less, and those that keep them have the annoying "Fade Away" HUDs that make you draw your weapon every time you want to check your health, ammo, or anything else. And even then, the HUD is tiny, cramped in the corner of the screen, only showing one weapon at a time. I remember the HUD from Doom. You could see all of your ammo, for all of your weapons, equipped or not.
Then there is the fad of getting rid of cutscenes. And placing everything in-game. What's wrong with cutscenes? Giving the player freedom of movement during important events means that they could miss important information. It lets the developers show us what they want to show, and not have to jump through hoops to get us to focus our attention on important objects with things like of glowing audiologs...And with many games these days being designed around surround sound, you can't hear people you aren't directly facing, unless you have surround sound. For example, if there are two characters standing a decent distance away from each other, talking back and forth, I have to keep switching my reticule back and forth between them as they exchange dialog, a cutscene would remove this annoyance. These cutscenes don't have to be Metal Gear Solid levels of ridiculous length and frequency, either.
And finally:
THE REMOVAL OF SUBTITLES
Halo 3 says it has them, but I never saw them as I gunned through hordes of brutes. Even when I switched them on! Not a big deal, as it had cutscenes.
Assassin's Creed 1 was REALLY big on this. I had to do the "turn to face" thing I described above to an annoying degree, as Lucy and Vidic talked to each other from across the freaking room and I'd miss snippets of dialogue frequently. With no subtitles, I had no clue what I missed in this plot heavy game.