Naruto never had a set plot. Naruto shippuden is a set plot though.
I'd say watch Shippuden first, then watch naruto for backstory. Just like how I'd say watch FMA BH and movie THEN watch FMA and movie.
I'd say watch Shippuden first, then watch naruto for backstory. Just like how I'd say watch FMA BH and movie THEN watch FMA and movie.