I do sometimes. I love my Kindle, and use it almost daily, for fiction and literature.

But for work and hobbies I am flooded with PDF's (some spec sheets, but a lot of actual technical books). I tried different eBook readers, tablets etc. And I have found out I prefer reading them on my hires desktop monitor, where I can google details etc. And it's there that I usually need them.

Also comics. For some reason I prefer to look at them on my monitor than on tablet. Not sure why, because tablets seem like tailor made for this.