Two things I particularly like about Bouchercons

First and foremost, everyone I've ever met at a Bouchercon loves to read.  I'm as much a media fan as most folks, so I also appreciate the many media aspects of SF cons, but it's also great to go to a con at which everyone loves to read books. 

Unsurprisingly, at a typical Bouchercon, such as this one, the dealers' room--which Bouchercons tend to call "the book room"--contains either exclusively or nearly exclusively books.  I love wandering aisles of booksellers and seeing what's on offer. 

Again, don't take this as meaning I don't like the many other types of dealers at SF conventions; I have no problem with any of them and quite like some of them.  It's just great to be in a room so filled with booksellers.

The closest analog in the SF world is the World Fantasy Convention, which I also very much enjoy.  Because I read heavily in both SF and mystery, though, coming to Bouchercon is a special treat.