I love reading and i'm pro E-book all the way.

Not only it's an ecological choice, i find them way more comfortable than real books as i can read them everywhere. Not to say you can bring your entire library in 1 device, pay less (usually), and don't have to wait for deliver or have to go to the store

Depends for what reason. For learning languages reasons I prefer e-books, because it is way more comfortable searching words in the internet in your e-book reader as the old school way searching words in a dictionary.

But If I read German books I also buy printed books.

Printed books! Because i'm accustomed, I would like to try e-books, but i think it causes a lot of visual fatigue

I am in "traditional" group- prefer printed books. I do like the smell, and touch soft paper ;-)

Some books are beautifully published and it is a pleasure to read them!

Printed, always!