I used to love reading on paper–its smell, the texture, easy on the eyes, etc. Then switched to reading most everything on my desktop/laptop. Now I find that I don't like "looking up" to my screen to read anymore and I much prefer reading on my iPad–which fits in the same space that paper used to occupy.

Note for Kindle Lovers

Yes, the Kindle feels even more like paper and not only because of its reflective display technology but its weight, insignificant power consumption, etc. However, today's "paper" also has to let me browse the web, run apps, support color and touch/gestures, etc. Unfortunately, the Kindle is brain-damaged in those dimensions.

Worse than that, the Kindle is locked into the page-at-a-time model.  The iPad book readers also use that model, but it's a choice. The Instapaper reader doesn't have that limitation and let's scroll the text instead of "flipping" imaginary pages. Eventually, the other readers will support that, too.  They can do it any time they want.  Given its current display technology, the Kindle can't; it is not a choice.  So, it is locked into the old model of cut pages.