1. Super Mario
2. Fire Emblem
3. Animal Crossing
4. Mario Kart
5. Wii Fit
6. Wii Sports
7. Donkey Kong Country
8. Zelda
9. Pokemon
10. Kirby
Although if I could count Earthbound, that would be number 1.
If the new Xeno game turns out well, then that could also be number 1.
Metroid, Punch Out, F-Zero, Lylatt Wars... Probably favourites among people here, but I just could not get into those franchises at all. This is one thing I really like about Nintendo though, you may not like everything they release, but you will probably like a lot of it. They also have TONS of valuable franchises - most other companies cannot create lasting franchises the way Nintendo is able to.
I describe myself as a little dose of toxic masculinity.