1. The games you like? Duh.
2. Do you want NTR? Only you can know such deep questions.
3. Emulators exist for plenty old generation consoles, and the Virtual Console collection has plenty of games also, check here...
although i ended up accidentally changing my nand with no way of going back bc i didn't know you needed a gamecube controller to restore it (i have a wii minus/1.1, which doesn't have gamecube controller support)
and if i find the sd card i have my NAND backed up on, i can not only restore the NAND if i solder the right part in, but i can also put my NAND on dolphin, then i can play dolphin online, like PMEX Remix or MKWii Riibalanced