Also, many of these countries have free English-written dining guides. Check them out.
Granted, in places like Saigon and Bangkok, they are a lot of fun, but make a point to get out and explore other places. You'll never know what's waiting just around the corner.
The second reason is memories! Think of all of the adventures that you will go on if you are in Africa. Even if you are the conservative type you will still stumble across something exciting and meet people that enjoy the same things that you enjoy. Also, you don't have to go to Africa, you can travel anywhere that tickles your interest.
The third reason is for the pictures! When you travel the world you will get soooo many picture opportunities that you will go crazy, from happiness. Then you can come back and share all of your awesome experiences with your friends and family.
Take the tour deals seriously: Pretty much anywhere you go (of the major tourist destinations) there are sure to be tour pamphlets sitting around with great deals. From boat rides to day trips, there are great tours around that will get you where you need to go.