I had two main anime that I soon as ended them I immediatly started re-watching them and that was Lucky estrella and Tokyo Mew Mew..even though I don't re-watch the episodes in the same order as I would when first watching the series-but anyway those two came to mind.
Well, I've watched Elfen lied three times. Once on a pewny, crap phone in Engish, once with my mate in Jap, then my younger sister just last month. I've watched Sailor Moon to many times to count, Dragon Ball Z too. I've seen Death note twice and avatar the Last air bender (If that counts) bout 10 times.
1. Code geass 2. Darker Than Black(both seasons) 3. Dragon Ball(original, z,gt) 4. Black Cat 5. Birdy The Mighty Decode 6. Bleach 7. Death Note 8. Gundam Wing 9. .hack//roots 10. One Piece 11. Pokemon 12. Prince of Tennis 13. Rurouni Kenshin 14. S-cry-ed 15. Special A 16. Oran High School Host Club 17. Kenichi 18. Hunter X Hunter 19. Gash Bell 20. Full Metal Panic Fumoffu 21. Air Gear 22. R.O.D TV (the story sucks but fight scenes are just too epic)
I've rewatched one called Suzuka three times o something, Vampire Knight like a million times xD And one called Bakugan, I've watched many episodes many many times over and over again, but not the whole from the beginning to the end since it's so long. And I'm sure I'll be watching the anime I recently discovered again too; Hiiro No KakKer. You
Rewatched? humm....... Series: Darker Than Black Trinity Blood Samurai 7 Samurai Champloo Baccano! Hellsing Ultimate OVA's Blue Exorcist (Ao no Exocist) Jormungand Movies: Cowboy Bebop Knocking on Heavens Door Trigun Badlands Rumble Sword of the Stranger Final fantasía VII Advent Children