I can see it.

He would try it out because it looks fun.

I would like to see it.

The way I see it:

Jasper would be weary because he was used before, so I don't think he'd be easily manipulated. I think he's been through lots of things already and he wouldn't consider being one.

Carlisle is too smart to actually think of being one.

Esme and Alice both seem kind and loving, and the thought wouldn't cross their mind.

Emmett - I don't know, he doesn't seem like DE material. Neither does Bella.

Rosalie, she's not stupid either.

Edward, I think, would be the most likely to be a DE. He wouldn't know what Legilimancy is, and so I'm sure the other DEs would put fake thoughts/pictures in his head {like Voldemort did with Harry} and I'm sure he would feel so weak and tormented by everything he's forced to see, that he would join

^whoa, you made me change my mind

he`s a prick