I went with Harmony Girl for my challenge, and a "Tall & Skinny" card size of 3 1/2 x 8 in order to get every single inch of Harmony in there! I kinda like how she turned out!
Stamp: Harmony Girl (Unity Stamp Co.)
Ink: Versamark, Smoky Slate(SU!)
Cardstock: Basic Black, White and vellum
Embossing Powder: Hematite and Silver pearl (Stampendous)
Liquid glass (raindrops)
Misc: paper clip