Weather
From tropical to subarctic, from desert or arid to savanna plains and jungle regions, the weather of Africa is varied and wild at times.
Currency
Each country has their own national currency. See more details here: http://goafrica.about.com/od/africatraveltips/a/Currencies-In-Africa.htm
Religion
The major religions in Africa are Christianity or Islam. Other 'traditional' religions exist among the wide variety of geographic regions.
Couples will love
The quintessential romantic 'African experience' would have to be a luxury safari!
Best time to go
The dry season is often the best time to visit as travel is easier. Although rainy season has its benefit too. It depends on your purpose of visit! It's a huge continent and different areas have different optimal times to visit.