5th gen: falling out with squaresoft and the whole ignorance towards CDs as a gaming medium. Their arrogance in previous gens towards 3rd parties prob didnt help, wouldnt suprise me if a few 3rd parties didnt enjoy making money with sony whilst being able to stick 2 fingers up at nintendo. i couldnt care less tho, n64 ruled! some of the best games ever are for that console imo. ps1 was cool too 
6th gen: lack of innovation and direction. i think the gc was nintendo at its creative low. cant think of many games that were a radical improvement over their n64 prequels. the gc was just nintendo trying to make its own ps, plus sony were so far ahead with the release of the ps2 this gen was pretty much over straight away.
If nintendo released a gc2 i think the e3 just gone would have been nintendos announcement of becoming a 3rd party.







