Do signed copies excite you? Tempt you? Delight you? Or does it not matter to you?
According to my LibraryThing catalog, I have 62 signed copies now.
If I'm going to buy a book and I see signed copies at the store, I'll buy the signed copy, and I love going to readings and meeting authors to get my books signed. It's a great memento of the occasion, and an opportunity to tell an author I appreciate his or her work. I won't buy a book I'm not interested in just to have it signed but I've been known to make the occasional impulse buy at a reading. I have a special bookshelf in my office for my signed copies- and it's filling up fast!
And this is an old picture- I'm now on to three shelves!