I do not have that many memories with the Metroid franchise (I only have Metroid: Other M and Metroid Prime Trilogy which I got recently), but I do really enjoy what I have played. The first Metroid (which I was only able to play on an emulator) was a bit hard for me, but it seems to be a game that I could get further on if I have I also liked Super Metroid, Metroid: Zero Mission and Metroid Fuzion, though for every game I have not gotten very far (I generally only use emulators to test a game to decide whether or not I will buy it). I really hope that the NX will have a Metroid game: if the NX launches with say a new Metroid, Breath of the Wild and a new F-Zero I will definitely get it day 1.