I read ebooks because I can store an entire library on little SD cards and have any book I own readily at hand for reading while on break at work or just waiting around for appointments, rides etc..
Also ebooks do have a lot of Green Earth value. I also live in a rural area so its a 20 mile drive to the nearest bookstore. Ebooks download from the internet to my computer in seconds no matter where I am and I can start to read without all that waste of gas for the car or paper.
Another factor, I like to buy ebooks of my favorite keeper paper books as I find my ebooks are easier to locate!!
My paper books always seem to be stacked up randomly and finding a particular favorite can be challenging.
One day I might get my paper library more organized but somehow if I haven't done it yet, most likely I won't!