Parents typically discuss the importance of being careful with the selection of friends with their children. Some parents go even further to warn their children that some 'so-called friends' aren't really who they claim to be. This last guidance is something that's often learned too late after expecting a friend to be available (e.g., physically, emotionally, spiritually) in a time of need. It's at this point that individuals can be faced with the reality that their expectation(s) won't be met.
The categories and classifications provided are partial lists of the various types of good and questionable friends, respectively.