I am also one of those (few?) here, that are very partial to serif over Sans-serif. My browser uses Serif by default, and all my documents use Serif for body (a

I am also one of those (few?) here, that are very partial to serif over Sans-serif. My browser uses Serif by default, and all my documents use Serif for body (and sans for headings if people want heading to look different) I too find serif fonts more readable, without necessarily being able to give a "scientific", "why" it is so. As another commenter mentioned the "l" and uppercase "I" is one frequent area of confusion with sans. And maybe serifs with their kernings give a certain visual guidance as the eyes bounce off the words... Having said that I've definitely given "Times New Roman" the boot. I've never found if aesthetically pleasing to the various other font names I used to see mentioned in all those books I read.. Now with proliferation of FOSS fonts like Linux Libertine, PT Serif and so many other more eminently readable fonts, Times New Roman is a distant memory to me :) It is a shame that many new OReilly books are adopting Sans fonts for their paper version as well. I for one am very displeased with this as there are times when I would like to buy a paper version for my bookshelf. Fine, do it for the ebook version, but not for the paper one, please... :(