Since they are based in Whiteman AFB, just east of KC, I get to see one every now and then.
One time, driving on I-70 east, I looked to the south and saw something above the trees. I couldn't quite figure out what it was, since it had an odd silhouette, but I though it MIGHT be a B2. I watched it, also trying to figure out how far away it was. Then it turned what might have been base-to-final and it was WAY closer than I thought. It was really big, once I could see the whole thing. It's an odd looking thing, but pretty cool to see it in the air.
I also remember, in the Fall of 2001 when everything was grounded, hearing a jet overhead. It was so strange to hear any aircraft that I had to see what it was - it was a B2 heading west, probably being re-stationed to Guam just prior to heading to Afghanistan.