There are numerous advantages: no bulk, no weight, no folded corners or lost bookmarks, and definitely no additional space required on the bookshelf. They're usually cheaper than printed books and many can be found free.
|My Kindle App's "Bookshelf"|
And while I enjoy all those things, the reason I've come to prefer reading eBooks over traditionally printed books is that I can do so more easily. And that's what causes those strange looks from people.
By "easily" I mean that my middle-aged eyes, even aided by bifocals, can focus on the back-lit beige screen with far less strain than on printed paper. Perhaps it's because I spend the bulk of my day using or programming computers. I don't really know the reason why, I just know what my eyes prefer.
My tablet is not a dedicated eReader. I use it to keep tabs on email, manage my schedule, browse the web, and even as a GPS when necessary. (Oddly enough, I've had it for over a year and have yet to play a game on it though.) But it is first and foremost, my preferred means for reading.
I've always loved the feel of paper in my hand when I read. And I always will. But I've now come to the point when I must choose functionality over feel.
What about you? Which do you prefer?