Alpha: Deltas tend to see Alpha types as fun company and interesting people to discuss ideas and prospects with, but naive and inconsistent in their personal and business relationships. Alpha types seem to lack the common sense to turn their fun and creative energy into something productive and often seem overly idealistic.
Beta: Deltas tend to see Beta types as people who "dream big" and always want to turn things into grandiose endeavors, yet can't manage day-to-day affairs effectively. Also, Beta types seem unwilling to consider things from the point of view of others, which gives them a streak of meanness and cruelty.
Gamma: Deltas tend to see Gamma types as driven and reliable in personal and business relationships, but not sufficiently understanding of people who want to pursue their own individual path in life. Gamma types sometimes become too demanding and can have a streak of vindictiveness or spitefulness which prevents them from being accepting and forgiving.