My problem with journals, quest markers/maps, and voice acting isn't that they exist, but that they're implemented badly. Journals in RPGs don't seem to be written by the same person that scripted the dialog. It's easy in these games to run into a new quest while in the middle of another one. So say your off to kill some ogres that stole something and you talk to someone who asks you to rescue their daughter. They tell you their daughter was taken to a fort and to get there you go south until you see a big tree then head west. But it's ogre smashin' time so you put the kidnapping aside, go to the ogre cave, kill them, and recover the Chalice of Unflatulence. Now that the king is safe from beer farts, you can rescue the girl from the Wet T Shirt Bandits. So you open up the journal and it says, "Rescue Natia Ipples from The WTS Bandits. They are hiding in a cave south of town." WHERE DID THE SPECIFIC DIRECTIONS GO! You go back to the parents to get the directions again, but all they do is ask, "Have you found our daughter yet?" Yes you idiots, she's just invisible. Who would have guessed that the Wet T Shirt Bandits wanted to make women less visible?
I have the opposite problem with quest markers and maps, they are too specific. I was playing New Vegas today and I needed some information from a deputy, but he had been captured by some escaped convicts so I had to rescue him. Someone told me he was in the hotel across the street and I got a map marker for the hotel, reasonable enough. But when I entered the hotel, I still had a marker that lead me right to him. Now none of the dialog told exactly where he was in the hotel; No one said,"They probably tied him up in the bathroom, because our deputy gets the squirts when he's nervous." Where did the specific directions come from? Holes like that really damage my immersion in RPGs.
Voice acting, yeah I have some problems with that too. You always get an opportunity to name your character, but no one ever uses it. In New Vegas, everyone refers to you as "that Courier," which is a problem because getting shot in the head pretty much ended that career. In Fallout 3, you're the "Vault Dweller" to Three Dog, even when you've gotten so famous or infamous that he should know your name. (Shoot him shoot him in the head Go get the dish he wants then drop it in the radio station and say,"Here's that dish you wanted you extorting prick and here are some bullets too!")
Another problem I have with voice acting is that conversations always return to a medium tone. In the beginning of Fallout 3, a female character wakes you up to warn you of impending doom. I always respond to the wake up call with the dialog choice,"Oh I was just dreaming about you," to which she says something like,"Oh Gross!" My problem is that the creeped out tone of voice she has stops after that line and she goes into the normal exposition of the situation. It must be too expensive to have a voice actor record the same lines with different underlying emotions, but what is possible just feels unrealistic to me. And it gets worse, just tell your father (Liam Neeson) that you murdered an entire population and he'll be upset for about two lines before he remembers that he needs you to advance the plot.