*cracks knuckles*
I was a fur before I knew what it even WAS.
You like animals who act like people? You could be a furry. :3 It's a wider range of acceptance than a lot of people think. You could honestly just be there for the art/stories. You could feel like you have a spirit animal guiding you, you could think you WERE the spirit animal. But mostly it's art, stories, music and a community to share them with. Yep, it's odd. Nope, most of them don't care. I literally started being a 'fur' when I was a kid. I really liked all of the talking animals in cartoons and movies, so I started making up my own characters. Then when I finally got the internet I found out there were a bunch of other people like me.
A lot of people just really like a certain kind of animal and think "wouldn't it be cool if I could be a rabbit? I could totally run fast and be really athletic!" or "I'd love to be a dog! They're so nice and they love everyone without judging!" Or you could just think tigers look pretty badass. :3
And no, regular ol' furries don't want to wear diapers and a lot of them are very much against such an idea, but they're boogerheads and I ignore them. Mostly this is because of two things, either they don't like the idea of someone wearing and using a diaper (there have been incidents at conventions for furries) or they think it's linked to pedophilia.
AB = Babyfur (BF) or Littlefur (LF) - Babyfurs are generally younger than Littlefurs, mostly infant age when regressed. Littlefurs usually have a regressed age of toddler+ and that's why there's a distinction.
But it's not always a hard-and-fast rule that you have to use one or the other.
DL = Diaperfur (DF) - A fur-covered diaper lover. :3
Poofybutt is pretty spot on. :3