So I take it you don't really like any Bioware game? The first Baldur's Gate didn't really have much quality writing but I thought the plot was good enough and consistent. It was the sequel which expanded to more intricate dialogues with characters and your companions but let me digress. I thought NWN: Hordes of the Underdark and the first Dragon Age had some good writing. Mass Effect was good plot-wise but I could never get into the characters.
Not necessary. I feel you're trying to sum up up everyone who plays their new games into that creepy 40+ category but most of the people who played Mass Effect 3 were just regular gamers (well for the most part, you've got that creepy romance fan-base there too).