Hands down mine has got to be "Hero's Come Back" in Naruto. It always makes my head bop and it's fun to sing along. Although for Naruto Shippuden, "Silhouette" has always been on my weeb playlist!
Mod Edit: Also including EDs/Insert songs
OP 2 for first 200 ep
OP 16 is my favorite of Shippuden. Love this show so much
https://www.youtube.com/watch?v=zVgKnfN9i34
https://www.youtube.com/watch?v=SRn99oN1p_c
Well, since Blue Bird is the only Naruto opening I actually liked, I'll just second that one. It was a great song.
Silhouette would be my second choice, but only because of the Bang Dream cover.
I have a lot i love so here's a list:
as for Shippuden:
you really know your stuff

i still stand by sign being the best naruto shippuden opening i feel like it gets over looked by blue bird and the other big one
This one has such a "nostalgic comeback" feel, if you know what i mean. I havent even watched more then 20 eps of Naruto (and 2 movies), but this song still gives me the feels.
(i suppose because even though i dropped it, it was technically one of my earliest animes - and i still instend to finish it one day)
Bronze medal:
Stance Punks - No Boy, No Cry
Slightly different from all other OPs with the japenese punk and I just love the Akatsuki shot (that unkown mysterious organisation during that time of the story) at 1:09
Silver medal:
FLOW - Go!!!
2020 and we are all still fighting dreamers
Gold medal:
Kana-Boon - Silhouette
I would say one of the greatest/most recognizable OPs in all of anime. The story of Naruto peaked during that arc and this OP caputered it perfectly