I kind of cheated on Marnix's meme of nekkid but tasteful [booty] pictures, I must admit. I took the Lady Godiva approach.
Now I feel guilty about it, so I have made what I think is a NBTBP publicly visible on flickr.
It's a little ironic; for a long time, there was a big argument on flickr about SL snapshots being mere screen captures, like people clicking PrtScrn to show you their spreadsheet or their spiffy window manager theme. Now, because of a bug in the Snowglobe client that causes photos saved to disk to be solid black instead of actually capturing the image you so carefully composed, to get this "photo" I actually had to do a screen capture--so you'll see the SL UI.