Welcome to FlyerTalk.
To get started, you could put hours and hours reading posts about the different FF programs and what makespeople use them. You can go back a long way and will get more information here than any other place. Remember, most occasional flyers are going with price; others go for the miles. A lot depends on how and when miles are used. You'll also see why people show loyalty and/or whay it takes for them to leave a program.
Good luck.