I love black wheels...
but the color of the car makes a huge difference. Black wheels work on Black, Red, and sometimes white and silver cars. They don't look good on blue, green, etc.
Also, I really learned that if I have a black wheel it needs a polished lip. The all black against the tire doesn't usually look that great. I painted my 97 T-bird wheels black years ago, and I couldn't figure out what I didn't like. Then I did the 93 Cobra R wheel on my clone build and I realized what a big difference the polished lip made.