I remember watching this series when I was a kid and watching it again after so many years, I am now even more impressed by the quality of the episodes.
Each episode has interesting character stories. Bill Bixby's portrayal of David Banner as the haunted and hunted scientist turned hulk is definately the heart of each episode. Bixby successfully plays a compassionate man who is always on the run and in need of compassion himself. His character is generally a good role model for kids to see.
Lou Ferigno is great as well as the Hulk.
I watch it with my wife and kids and we all enjoy it..