I’m shamelessly stealing this from Cyberkitten!
What is your average monthly budget for books?

Officially, my entertainment budget allots $20 for books.  It is usually exceeded a little bit. $30 would be fairer, but I’ve decided to place myself under an Amazon/Steam interdict until Christmas.
What’s the most you’ve ever spent in a bookstore?
I have technically spent $50 in a bookstore, but that was spending gift cards. Mostly in bookstores (BooksAMillion is the one I frequent), I drink coffee and look at new arrivals, taking pictures of ones I like until I find used copies of them.  I DO buy Star Trek books and the odd magazine, though.  Whenever I find an indie bookstore on vacation, I try to find a book to buy in support.

Are you willing to pay full price for a brand-new release or wait until there’s a sale?

I almost ALWAYS buy books used or on sale because I’m a self-proclaimed Cheap Bastard.   There are exceptions, however:   I will preorder a Kindle book if the price is right ($12 or under) for certain authors or series.   I’ve preordered all of the Firefly novels, for instance.
Would you rather buy one new book or several less expense used copies?

Depends entirely on the book. I’d be drawn to spending money on several used ones unless the new book in question was from a great author on a great subject.

What do you think is a reasonable price for a hardback, a paperback or an e-book?

I can’t justify spending more than $12 on an ebook, or over $20 for real books even new. I mostly buy used or take advantage of Kindle sales.
Is a signed book worth more to you? How about a 1st Edition?

A signature would only matter if I had obtained it personally, in some exchange with the author, and then mostly to strengthen the memory.

What is your most valuable book?

Probably my copy of Glimpses of World History by Jawaharlal Nehru.  Used copies were selling for $80 – $150 for years, and then someone offered one for $25 and I snatched it up.  I just did a price check and looks like a re-print has pushed down prices, but at the time…

Would you pay more for a different cover or a specific edition of a book that you like better?

Probably not, although I will spring for an original cover if a reprint has been marred by a television drama’s actors.

What physical characteristics does a good quality book have?

Heft, paper thickness, paper texture,  font choice.

If you won the Lottery what bookish things would you be spending on?

If I won the lottery I’d buy land deep in the country where my house couldn’t be seen from a public road. I’d probably build a house centered around a library/reading room with relatively small areas on either side of it.  I’m into simple living, so my actual living quarters wouldn’t need much.