Yeah the smaller one.
But its probably because it was my first dog (and second, and third, and fourth...
If we had got something else, something else would probably be my favorite.
However, if any mad scientist ever tries to breed large Chihuahuas, put them down. The scientist I mean, cause those creations will take your arm off. But they are fine small cause you can just scoop 'em up if they go mental on you.
We have five Chihuahuas and you are right about them. I once told our vet that I was glad that they weren't big dogs because they would be dangerous. He said that if they were big dogs they wouldn't act that way. It's natures way of making up for lack of size.