Some episodes I've watched several times, just not the whole series.
1. Dragonball Z (+movies)
2. Bleach (+movies)
3. Mahouka Koukou no Rettousei
4. SAO (Sword Art Online)
5. HotD (Highschool of the Dead)
I often play World of Warcraft in my free time whilst listening to Rock/Metal. An example of my music tastes: http://www.youtube.com/playlist?list=PLO52hNydYP_XxCl3Q7qYqAqVU7PxZg9kv