For me it's KYLE!!! He's the most adorable villager ever. He's a "big bad wolf" but has a SMUG personality and he's like an epic rock and roll dude!!! I want him so badly it hurts! <3
My #1 dreamie was Moe! He was my first villager in my first ever animal crossing game yeaaaars ago. ^^ Due to a misunderstanding (I thought when you reset a town, you could choose your villagers and layout), I lost him and looked for him in newer games to no avail. :c Lazy villagers are one of my favorite types, and cats are one of my favorite species, so he was bound to be a huge favorite for me!
Now that I have him though, my #1 dreamie is Ruby the rabbit. I really like her because her eyes are red, and also because someone based a character from a really good webcomic after her. ^_^