Although I like books, electronic format just has too many advantages. You can have hundreds of novels/volumes of poetry/plays AND all your work books on a damn iphone or kindle, AND you can take notes while you are in the plane, train, coach, subway etc. You just can't beat that kind of convenience and use of time.
Downloading them in about 10 seconds is pretty cool too. And moving house has now become far easier for me, since my book collection took about 3/4 of the volume each time, the rest of my stuff fits in a few suitcases.
So, I'll keep a few books since it is nicer read a physical book than an electronic device, but for most that I plan to only read once, e-books it is.