the one thing that would RUIN the game for me is if Rockstar did what Just Cause 2's development team did and not add an in game radio (unlikely that rockstar would do it tho) but what could also ruin it which is possible is if they copied the song list from Saints Row 3
Try to find Gamefaqs http://xkcd.com/802_large/ http://i1111.photobucket.com/albums/h474/BunnySock/mabinogi_2012_07_10_001.jpg
I can't really think of anything that would truly RUIN the game for me in terms of features. The only thing that would seriously bug the hell out of me would be if the driving camera was as wonky as it was in IV.
Isn't it odd that Mr. or Mrs. high morals only problem with GTA V is prostitution? Not the rampant theft, murder and general disregard for life?