Well as for me, I've never seen one (or maybe just didn't noticed) until 2 years ago in Madrid metro when I went to SIMO. There I was when I noticed some lady looking into a gadget, I wondered what was that, thought it was some kind of agenda but later she turned her back to me and I could see the screen and I was astounded, she was reading some book in it. I kept staring at her for the rest of the trip when my school mates had to literally pull me out of the metro because I didn't noticed we had arrived at our stop. From there on I've always wanted to have one e-reader and seems like I finally got the chance
But until this year there was the problem of not having money to buy one, and they were expensive until the past year. But I think I really decided that I was going to buy one when I saw the front page of Amazon, and I "wasted" 2 months researching and trying to decide which e-reader would I buy, but I went for the Kindle.
Before that I've always wondered, man I wish there was some device where I could read books, never considered phones an option (too small).
Here in Portugal we officially only have Cool-ERs and Cybooks on stores and even so, they are hard to find, it's a new thing here and online stores only got a category for them like this year or so.
I find a hassle to read paper books, sometimes too heavy (fantasy and SciFi are evil

) to hold or carry. The loss of space in a bag. They are damn expensive, seems my country charges a lot for translations and just couldn't find that many originals. You can have a book you love ruined, either by a person, mouse, humidity, etc. If that book gets ruined or you lose it maybe you can't just have another because they don't sell it anymore. Well this is mostly the reasons I haven't read so much up 'till now.
BTW if someone told me before I've seen with my own eyes, that there was a screen that was paper like and without light, I would say they were out of their mind or something like that. Electronic paper technology is really impressive.
(Sorry for the long story

)