For me, the nice look and hefty feeling are worth the extra cost. I don't buy a lot of books, so my bookshelf has plenty of space on it. I'll check out paperbacks in the library a lot, but unless I find a series that I really get into, I don't buy. Single books, however, I buy in paperback. Odd?
No odder than me. I only have two fiction series that I'll buy the books for - Dresden and a historical mystery series. Love both so much that I'll even pay full price. Most of my other books are gifts, travel books (which I buy a ton of - lightest thing to carry home), or nonfiction.