Mario can't croon boy, don't ya agree?
Now this is an important one.
Whilst Nintendo had always positioned itself as a family-friendly company, it wasn't until Animal Crossing (which debuted on the N64 in Japan) that we saw the beginnings of the open-to-all design philosophy that subsequently allowed Nintendo to dominate the market with the DS and Wii.
A string of identikit sequels later and it's easy to forget just how forward-thinking the first Animal Crossing was. Before this, games almost always punished ineffective players with virtual death and/or the undoing of progress they'd made. Here players lost virtual friends. Inevitably, that stung more than losing virtual lifes.