Although Farfl has many friends in the park I take her to, there is one dog that I think she loves above all others - Newt.
We first met Newt at the Toronto Chihuahua Meet-up group and haven't stopped bumping into him since - luckily he only lives across the park from us.
I read a lot about Chihuahuas before Farfl came to me and one of the facts I found most intriguing was that Chihuahuas get on with other Chihuahuas better than other breeds. Although Farfl is pretty well-socialized and will say hello to any dog (unless it's a big one running right at her) I would agree that she loves to hang out with other Chihuahuas the most.
We are lucky in our local park - there are three other Chihuahuas we see regularly: Newt, of course, but also Bella and Lola. We've only managed to get them all together once (and of course I didn't remember to bring along a camera) and it was wonderful.
PS - don't anyone tell Asher the Yorkshire Terrier.