Well I am every day willing to pay the extra bucks for hardcover books, I like them a lot better, they are better for me transport wise (sorry the weight/size of them doesn't really matter since I only take along perhaps 25 or so books to any game).
Hardcovers are to be prefered any day for me, because things tend to break etc if it is not hard and with high durability in my home (I mean anything! it has to last if I am gonna use it).
Now this sadly doesn't mean much in relation to what I buy heh, more then a few softcovers I have have had a grusome fate (latest is BESM 2e first printing book :-( wehich is partly ruin now a days). I look at both hardcovers and softcovers as to what I buy, in fact unless I know I just want that one book, I spend a good hour or so going through everything to make sure I get a good book. Sadly lately all the good ones have been softcovers (not a FR fan, RL stuff seems to be gone when I am there, FFG material I DON'T buy as I don't find what I see umm balanced, but that is another discussion).
Well anyway if I buy 3 softcovers or 2 hardcovers doesn't make a difference to me really, but I be more happy for the hardcovers in the long run.
(for the record I am 22 so it is not uncontrolled young child syndrome that is the cause of the fate of my softcover things).