Zekkyou on 13 April 2014
Definitely the 5th for me. The PS1 pretty much forged the world of gaming we have today, so in my eyes it was probably one of the most important consoles ever released (along with the NES). Also, Final Fantasy 9 :P
Still, you can't not love the 4th. It may not have pushed many boundaries, but it certainly stood the test of time well.
