I'm looking at the Blu-Ray collection for Dragon Ball Z and the season names are a little too short to describe which story arc(s) they cover. For example, this is what is included in each of the sleeves:

• Season 1: The Saiyan Sagas
• Season 2: Namek and Captain Ginyu Sagas
• Season 3: Frieza Saga
• Season 4: The Garlic Jr., Trunks, and Androids Sagas
• Season 5: Imperfect Cell and Perfect Cell Sagas
• Season 6: Cell Games Saga
• Season 7: Great Saiyaman and World Tournament Sagas
• Season 8: Babidi and Majin Buu Sagas
• Season 9: Fusion and Kid Buu Sagas

My preference would be to update the English season names to match these listings.