Progun..........welcome to AH. In fairness, you can't really compare African hunting to most hunting in North America. It is entirely different. Have you ever been on one of those elk hunts where you are gone for 10 days and never see a legal bull or packed in on a 14 day spring grizzly hunt and it rains, snows, mosquitoes and you don't even see a grizzly, never mind a shooter?
Outside of specialty hunts like bongo in the forests of West Africa or other such beasts, game is abundant in the better hunting areas and you will see animals every day. Keeps things fresh and you on your toes. The difference will be finding the animal you want and then getting a shot at it. All of the usual problems with hunting will crop up such as finding the animal in a bad location, problems with the wind, animals in herds and many pairs of eyes, bumping other species during a stalk that spook what you were after.
Some species are much more abundant than others and like all hunting things do not always work out. I went hunting in a very good area in Zimbabwe for plains game and sable was at the top of my 'have to get' list. I knew other guys that had been there and raved about them...........I never even saw one. You will see game and you will get a good bag, but it is still hunting and nothing is a sure thing.
You never know how the day is going to unfold. You may start out looking for a wildebeest or a reedbuck and bump into a herd of kudu bulls and instantly the plans change and the day takes a different path.
It is pretty hard to have a bad plains game hunt when you book with a reputable operator and, as an added bonus..........you just about always have good weather on a hunt during the regular safari season in the Southern and East African countries.
Hope you have a great trip.