This is based off of my personal enjoyment only!

Books:
1. Half Blood Prince
2. Prisoner of Azkaban
3. Chamber of Secrets
4. Philosopher's Stone
5. Goblet of Fire
6. Order of the Phoenix
7. Deathly Hallows

Movies:
1. Prisoner of Azkaban
2. Chamber of Secrets
3. Philosopher's Stone
4. Order of the Phoenix
5. Half Blood Prince
6. Goblet of Fire
7. Deathly Hallows 2
8. Deathly Hallows 1