I voted for meaningful choices.
In general, the shorter the game, as more c&c it should have, imo. If the game is very long, then I am less a fan of it, because I probably won't do more than one or two playthroughs in a very long time (I simply lack the time nowadays to play 60 hour games, as example). Alpha Protocol was fancy in being reasonable short, but featuring so much c&c, that the end could look different in every single playthrough (and I did 9 at least).