I looove monograms and especially B's since I'm all newly-weddy and love my new last name. Everytime I see a "B" I can't help but buy it... I won't even let myself search for B's on Etsy, because I know I will buy them all! A few of my favorite decorative letters are below (all from Etsy shops!).
Moss covered "&" is from Restruct3
Bright yellow "C" is from Old Crow Farm - reallllly cool Etsy shop - they were featured sellers last week and rescue all sorts of junk and turn it beautiful!
Cute "P" with flower is from Sam and Sophie Baby
Rustic "K" photograph can be purchased at PhotoNode