Super Mario 64. This is certainly the 3D title I played the most, I've collected the 120 stars several times and I just love the game. Platformers are my favourite genre and SM 64 is just a perfect game and I was in the perfect age at that time, I received a N64 with the game for my 9th birthday and I played it through the whole summer (my birthday is in June). I had 119 stars for several months, but sometimes I was finally able to get that 120th star.