My favorite? Damn, that's a hard choise. But I think I know who it is: My favorite villager is Tia.
She wasn't always one of my dreamies, I didn't really consider her any special, but I thought she was really cute. One day, I found someone was interested in trading her for a villager that I didn't like much (Teddy, I'm sorry beary boy) and he was actually one of her dreamies. She wanted to trade Tia for Maple principally, but the deals she got in always crumpled down, so she decided to trade with me.
I love elephants and I remember than when I was a kid, I asked my mom if I was a daughter of them (because I'm very tall for the average, taller than my mom since a very young age). I don't have a favorite animal, as I love them all, but elephans really do have a soft spot on my heart.
When I got Tia and I taked to her for the first time (at my now friend's town) I instantly and absolutely fell in love with her. Her personality, you could say, shares some similar traits with mine. She loves books (!) and is educated and elegant (she bows instead of waving her hand!!). She likes to read and take morning strolls, she loves gardening and is very sweet with everyone around her.
She's absolutely adorable and I could have never been as happy about getting a villager as I am for getting her. To me, she's has the sweetest and warmest spot in my heart.
It does not mean I don't love the rest of my guys-- Apollo (my bro), Genji (my boo), Ankha, Shep (I LOVE SHEP I love him), Olivia (sassy) and my sweet Merengue.
Edit: GOSH IT ENDED UP QUITE MESSY I'M SORRY I suck at drawing villagers and people and everything and my tablet was not working correctly, plus I'm busy doing other things so I couldn't make it more decent ;_; I hope it's enough.