I've never known a musician who didn't enjoy just looking at instruments, talking about them, and the like. It's like sports talk, but as a means to expressing passion--or at least getting the nervous tics out.
Personally, I can't play shit, but that doesn't mean I can't appreciate the amount of love that went into making these beauties. Some of them aren't so sightly, but none lacked for effort.
Know of better galleries? Post 'em in Comments.