This question came to me this morning as I was making breakfast(Yup, I'm pretty random). Which do you prefer when purchasing books? Hardcovers are usually pricey, thus way outside my budget. Though, I have to admit, I have indulged in the past. I hate trade. I dislike the awkard size and often find the book too flimsy. I guess, my personal fav would be mass market. It's compact size and usually decent price appeals to me.
On another note: Sisters of Orion, chapter two will be up soon.