In all the other Grand Theft Auto's some of the missions were challenging and often took replays. However, playing GTA 5 I progressed through the story missions quite fast and never found any mission difficult. Maybe the previous titles were harder because I was younger. Although, the missions seem watered down for children and there is even a skip mission button if you fail the mission too many times.
If you think this is true or if you think its quite difficult post a reply, i'm keen to hear!