Which ebook format do you prefer?

I use the .epub format for all my books. That way I can carry them on either my iPhone on my G1 droid with me. I much rather a epub over the other formats but my second choice is pdf.

For now, I still prefer PDF, as I mostly use print books and only use ebooks on my computer. I can't see myself getting a dedicated ereader, but might get a smartphone. For that, I would prefer ePub because it is usable across various devices/platforms.

I like epub as I can read the same book on my computer and phone. PDF seems great for something I'm planning to print out, but is not done well for a mobile platform. Epub lets me search through the text via a mobile or desktop reader.

*extremely nerdy bit to follow*

I really wish more roleplaying game publishers supported the epub format rather than pdf. There's an ebook-centric store called rpgnow.com, and I've purchased stuff from them, but it seems like a book of obscure rules for killing orcs and shooting spacemen would be better as a searchable, indexed epub file than a full-color PDF version of the printed book. I would gladly pay the same price as the hardbound edition for a digital edition of the 3 main D&D books from Wizards of the Coast. It would be so much easier to take an iPhone or iPod Touch to someone's house and a bag of dice, rather than hauling around 20-30 pounds of books.

Would have said epub but after seeing how nice some third-party apps work on the iPad, I am impressed that PDF formats render quite well. I think either way, we should have a standard, rather than have competing protocols, as to allow for maximum portability amongst the various disparate mobile devices

Personally, epub with a bullet as my favorite but with the caveat that pdf are required as backup. Some of the platforms I work on are old and I'm not sure have an epub reader available. I've had very good luck with .epub both on my PC and my Droid X. It's amazing how nice it is to be able to have my books around for reference without having to tote anything extra. And it's amazing how much more study I'm getting in now that I can just pull up my mobile phone and read them when I have some dead time.

I prefer epub. Even if I do not have the software to read the ebook, all I need to do is change the extension to ".zip" and open the HTML files in a browser, assuming that HTML was used in the creation of the ebook and it was DRM-free.

I love all the three format. They are best on their supported devices.

I like PDF while reading on Laptop. PDF support of my kindle 3 is not approachable. While Reading .mobi format provides great feasibility on Kindle.

I prefer PDF or EPub, as they can be transferred from PC to e-reader and to mobile, which lets you carry your books and media anywhere you go.