When I was a teenager, my parents owned a toy poodle that was a holy terror! lol
My grandparents had a miniature poodle when I was growing up. She wasn't too bad until she went blind.  
When my parents dog was a baby, he was so mean! He would corner me and he also had a vicious bite for such a little monster! haha 
My grandmother liked to point out that they were the second most intelligent dog breed, but I'm pretty sure that was the standard ones. Hers wasnt mean thankfully.
I think they are thought to be quite intelligent. I wonder if most of them are temperamental or if it's just the toy breeds.
I think all little dogs especially toy breeds like the poodle are temperamental.
I wonder what makes them so edgy! lol  Maybe, it's a sense of insecurity as they realize their size is quite small.
I bet it is their size. Probably scared and have to overcompensate. The smallest known adult dog was a yorkshire terrier.
I think yorkies are so cute and their hair is so smooth!
I had a friend with one, so theyre a popular companion dog. I heard they were used to develop the Australian Silky Terrier.