GTA V is Rockstar's most boring open world game for me. GTA IV's map was used to the fullest extent and its astounding how much is happening on every street, every street corner. And driving is fun as fuck, felt like each vehicle handled differently and had its own weight.
GTA V's map is largely wasted, the story and plot is so much more aimless than IV's, gunplay is so so so bad, no sense of progression in gameplay or story, characters outside Michael and Trevor suck, a busted pick up truck drives and feels like a less fast sports car.
I fully understand criticism lobbed at GTA IV, but GTA V deserves just as much. I will always be confused by how insanely successful GTA V has been.