well just thought i would throw some advice in here and see if it could help, the stuff based on the manga is epic and if you thought that highly of the zabuza arc (i did as well) i cant see you not enjoying the rest of the series minus the fillers, and in my opinion shippuden takes it to another level (though you will find debate on that, its just a matter of opinion) you can try wikipedia to see which episode numbers are filler and which are not (usually when you look at it by season information they mention which episodes are fillers or if the entire arc was filler) most of naruto 1-135 is is manga based, after that to 220 it is filler (i only found one filler storyline interesting and that would be the last one involving gaara, you will see him soon if you keep up) then when shippuden starts, the first 55 episode or so (not exactly sure) are manga based then it goes on and off because they want to let the manga progress a little further before they get any closer to it, so again the best way to check which episodes are which in my experience would be wikipedia (be careful of spoilers though) bottom line, if you like naruto you have to give shippuden a try when you get to that point even if it can be annoying trying to avoid fillers (and yes some of them are that bad), as far as any interest in the fillers go what i told you were my opinions only, the fillers for the most part until 220 are high on comedy and while i enjoy the humor in the main naruto story line some of the fillers comedy just takes away so much of the series feel(there are a few exceptions though) as far as shippuden fillers go you do not have that problem really the shippuden fillers are much more action based and try to live up to the more serious tone that shippuden takes on (my opinion again) so best of luck and no matter what you decide and end up doing i think that you will at least be hooked enough to make it through some of those awful fillers to continue to watch and follow the show until it ends (or at least visit it again one day)