Hello everyone and let me assure you that this post is not to say you should always be told exactly how to say your line, but if you have a good actor for a director, who knows how to communicate in terms you understand and can react to correctly OR who can speak your line exactly the right way in a close pitch to your character, you should not defensively think this is a bad thing.
I get the knee jerk "I hate line reads" comment mostly from Drama students or people with a theatrical background who think it's always best to let an actor "bring the words to life" without stilting the process with another person's interpretation. Get over yourself. That works for stage and screen a lot more than it does for VOs especially since a good producer or director should have a lot better handle on the project than any actor who just got a script and has not been in contact with all parties.
As far as computer games, often there is no real thespian acting needed or possible. You may be clicking on someone you encounter in the game (a non player character or NPC) and all they do is mutter something irrelevant, or they may have one line that gives you a mission or a clue to what else you might explore or do. Yes, it's nice to make every line the best it can be, but again, you may not be talking in a conversation to anyone. You are giving information, and it has to be clear enough so the player can remember what you said since they can't rewind the game to play you over again....but you want to do the line without a ton of improv like thoughtful hmmmms, and breaths, just so you get more time in the 'spotlight.'
Reality check time: Most gamers don't care about the voices or the acting. If it's blatantly bad script and the acting follows suit, then people take notice and pan the game with bad ratings. But there was that one game with such bad translations, it was comical "All your base are belong to us." That phrase is now a common idiom.
So let down the defensive mode and realize you may not know what will come out of your mouth after you're directed. If you try something and it sounds horrible, you can ask the director in another voice, "Should it be more even keeled like this?" or "Would you like it lower and more mean, like this?"
I'll wrap this up by agreeing that it's frustrating to be directed like, "Do it differently?" "I don't know, just different." "I'll know it when I hear it." OR they line read you and you imitate them perfectly only to have them not like their own direction. By then offering them more of a multiple choice in different voices or using different emphasis on words, you become part of a team that together should get a nice result, instead of having two preening prima donnas gritting their teeth, each thinking the other person's an idiot.
Last thing to note,,,,,,not all directors are the same. So you should not announce, "I want to give you three takes, then if you don't like something, we can try it again. I prefer not to be line read."
Often if the session is tight on time, you may not have time to do 4-5 takes including direction.
Relax and leave the attitude at the door. You'll find a lot more people will want to hire you again if you do.