I'm a little of both. I own an e-reader, it's a cheap little off brand one that I bought for $50. I've never purchased an e-book. I bought it for a few reasons. One being that it also plays videos, so I can watch movies and TV shows on it. Another being that I wanted to read the classics. As a writer, I'm always told how important it is to read all of the classics and I've only read a small handful of them. These books are all free domain, so I can get them offline and they don't cost anything (Project Gutenberg) and another reason is that I'm an actor, and sometimes I find myself working on 3 or 4 things at once, so I keep my scripts on me at all times, whenever I find a spare moment I study my lines. I can get electronic copies of my scripts, convert them to PDF and put them all on my e-reader. It's a lot smaller and easier to carry around with me than a binder full of scripts.
So for those reasons, I love my e-reader and I love how easy it is to get classic e-books (an that they're free, anything before 1923).
However, I like books. I have shelves of them at home. They idea of having my entire book collection on one electronic device scares the crap out of me. If I drop a single book into the pool, big deal, the pages will be wrinkly. If I drop my e-reader in the pool, there goes my collection. If ever I read a book, classic free one or a new one that I paid for, and I love it then I will most definitely go buy an actual paper copy.
Anyway, there's my rant on e-readers and e-books : )