Kakuranger and Akibaranger season 1 themes are my favorites. Honorable mention to Go-ranger and Dairanger.

Gekiranger definitely was catchy, including Abaranger, Gokaiger, Kyoryuger, and of course, ToQger. Loved these from the moment I heard them.

ToQger.
I love it. :lol

I forgot to mention, Megaranger.

Hmm I've never quite listened to Megaranger's before...

Well, it's definitely one of the catchiest songs you'll here if you ever listen to it.

Holy hell, I've got ToQger's theme glued onto my brain right now lol.

I'll definitely listen to it when I have time.

Yes, it is very catchy. Can't wait for the full theme to come out.

My votes for Shinkenger's opening. Dang it all that thing's catchy.