I rewatched the anime from the very beginning and didn't know what a filler is then XD
but in the middle of Shikamaru's battle with Akatsuki - I read the manga at the same time. Until I noticed that some of the past episodes are not faithful to the manga! XD I finished the manga just last year, and begin to participate in forums... 'cause I have alot of questions regarding the manga. Haha. And... become a member here in NB.
Skipped the time of Tsunade's dream/infinite tsukoyomi. But came back to watching because of Itachi's arc