I like paper books better. They look better, smell better, feel better, etc. On a practical level, you can just flip through the pages. It's easier to find what you're looking for. And unless it's a windy day, you don't have to worry about the pages turning when you don't want them to (or the page not turning when you do want it to, etc.). Illustrations work better too... no need to zoom in. (I can't imagine trying to read manga on my Kindle.) And no menus popping up when you touch the screen in the wrong area. And the formatting is way better in print books... maybe it's just my Kindle but for some reason the text moves around (like a sentence might be at the bottom one page, then when I flip back to it later it's on the top of the following page). I also hate the ads that come on if your device ever goes idle. I never had any issues with power. Maybe I just don't use it enough, but it usually lasts for weeks or months on a single charge. I also like that you can sell print books when you're done with them. And with print books you can spill coffee on them and it's no big deal. (I generally don't, though. My books are all in fairly good condition except for one of them that once got drenched in the rain by accident. In either case, my Kindle would probably be dead.)
Reading devices do have some advantages though. They have search features, which is nice. They also save a lot of physical shelf space. And you can save money, since public domain books are all free and other books are generally cheaper than their print counterparts. Also, I personally hate reading, so it's nice to have the text in text format so that I can have my device or computer read it out loud to me in the monotone robot voice. (Ideally I'd use audiobooks, but they aren't always easy to come by.) Haha, this is how I used to read all my school books back in college. I didn't even always bother to buy the required modern translations... I just downloaded the public domain versions when available, which were good enough 90% of the time; then had my computer or iPhone read it to me.
Another thing: maybe it's just me, but for some reason my hands often get sweaty when I read, so it's nice to not have to deal with the paper pages getting all soggy and dirty and warped.
