Like Ted, I'd say my main disagreement is with Ethiopia, and Addis. Wonderful experiences for us. Don't remember how much visa time we had but we departed into Kenya on the last day of its validity.
Would probably have extended if the rains weren't approaching.
I'd agree with Rupert about Tanzania even though he and I travelled through completely different parts of it - it's a BIG country.
Although really, in my memories, the whole continent that I saw was equally enjoyable.
As far as "worst people", I wouldn't judge such a category.
I think this is a good notion to judge all foreign people and places and customs by:
"When you travel, remember that a foreign country is not designed to make you comfortable. It is designed to make its own people comfortable." (Clifton Fadiman)
Back to Ethiopia, anyone travelling there would do well
to visit one of these places on the way, or at least get a clear idea of what a Woonerf is and get it firmly in mind that the whole of Ethiopia is an African version of one.
"Eye contact and human interaction are more effective means to achieve and maintain ......... safe areas than signs and rules."
Will look forward to reading when and how you reach the European side of the Mediterranean, it may be the biggest adventure of the whole trip(!)
Good luck!