What can I say... I stumbled across this in a search, and of course I found I had an opinion!
Addicted to reading, with a leaning to science, history, technology, SF, and probably other things.
Hard core techie at heart, sans details.
Currently bouncing among laptop, tablet, and three e-readers depending on when/where/what. The fourth e-reader has yet to be charged and loaded (it was grabbed for a cheap experiment that never got done).
I prefer real books most of the time, except in the dark, but don't want to have to carry them / make up my mind / not have a library with me.
Laptops are OK, particularly when running two or three screens and you want a reference, but not convenient for normal reading.
Tablets suck. Too heavy, too short a battery life, too many fiddling details.
Small readers with e-paper screens are good for casual reading, not so good for .pdf files.
Larger e-readers good for pdfs, and better for technical manuals if they don't have touchscreens (so you can run your fingers over figures, diagrams, flowcharts, and tables).
Active e-readers: Kobo Touch, Kobo Aura HD, Kindle DX.