My biggest gripe with Oblivion/FO3/Skyrim/etc are the lack of necessary and limiting choice. When you can do 95% of all quests in one playthrough, they aren't getting "choice" right at all.
ummm...you don't pay attention much do you? There are several choices that affect your game. Google is your friend if you are interested....
Several, as in... like 5% of the quests? Just like I said? Yuup.
I think you give them entirely too much credit.
Outside of the civil war quest line, there is not a single thing as "world changing" as nuking Megaton in FO3. ** You pick Stormcloaks or Imperials, and then it's a free for all with no consequences until the end of the game. After you finish the Civil war quest line, the NPCs in the cities basically act like it never happened. **
On a side note, a big thumbs down to those who posted pictures of the Sand Giant. I have spent entirely too many hours of my life trying to forget all of the hours of my life I spent waiting for that bastard to spawn. Does anyone else look at EQ screenshots and check all the player names, expecting to see someone they know? :/