Utterly Mad

Jak and daxter series, excepting the one where you fly around in an air ship which was the last one in the series I think.
They are not perfect, hell I remember some annoying instances that frustrated me to no end, but they were fun and they were one of those games from my child hood I still go back and play. The series also kind of grew up with it's audience a little. The first one was a lot more light hearted, which for the time in my life I played it was perfect, where as 2 was more serious and had a better overall plot, which for the time in my life I played that one it was really good.