GTA V.. Im replaying the missions to get the golds, the last trophy needed for plat. It comes down to something that is so fudgy basic. restarting. you can replay the mission after its done, you get retries when you die or miss checkmarks etc, but they wont give you a restart option. Plus, some missions require a no contact or dents etc in races. you need to completely leave the mission in order to restart that counter, which takes reloading the single player. and that doesnt even get into the AI crashing into you.
plus they have missions that have time constaints, but when you reload it to replay it, you start on foot, rather than in a car like you would have in the mission, so its handicapping you from the start
if only you played a game for fun instead of for trophies, you would have had A LOT more fun with your games