who is he
I love his character; he faces many conflicts in a realistic fashion and is quite mature. His design is very fashionable, too.
Mostly, though, I love what N represents: the advancement of narrative in the main-series Pokemon games. Whether you like N or not, you can't deny that his character is deep and meaningful, and he is part of what makes the plot of Black and White so complex and mature and...better than any game prior, really. N is essential to Black and White, and I'm hoping that more characters in future Pokemon games are as deep, complex, and interesting as N.