Playing with borders and signature

[F8&Bthere]

you may have occasionally seen my black f8photo border on posts to this forum, and I use LR2 Mogrify for that one to export directly from Lightroom. But I finally got around to trying that scan real signature to a PS brush thingy and tried it for the 1st time on a simple clean white border for a change. Do I need a thin black border to make it stand out from a white background like here or on Flickr? Should the sig be right on the photo instead of the slight overlap? Let me know what you think.