The top 100 list has already been posted, but I thought this article makes some interesting observations on the list.
Overall the variety of games and experiences on that list really show how versatile the deck is, and that people can still have a great time with games that aren’t a perfect experience on the deck.
I bet it’s the latter. I love mine, and “good enough” is often just fine for portable gaming. I’d rather maximize battery than worry about beautiful graphics; that’s what my desktop is for.