Glad Best Buy did right by you, that they installed to your satisfaction, and that you like your new Frame! Yes I have heard other complaints about "black" though I think the only black I don't like is the black Matte which is not true black, though honestly that may be planned that way. It did take me a while to get used to setting Art mode to look like wall-hung painting(s) vs. the "pop" of TV, but that is where the Frame excels.
You'll need next to spend the $5/mo for the Art Store--many hundreds of awesome art to choose from, to suit both mood and season!
Congratulations on your decision to GET WHAT YOU WANTED IN THE FIRST PLACE!