The Transformers Theme: What Makes it Great?

One of the greatest kids' TV shows of all-time, Transformers fueled the imaginations of a generation. Warring sentient alien robots, capable of transforming themselves into vehicles, bring their fight to earth. But, aside from that 1980's oh-so-cool premise, what was it that caught the attention of its viewers? I would argue it was the opening theme song (credited to Johnny Douglas).