AHAHA I was wondering if I should start a Sentai thread too but I figured if anyone's interested they'll do it since they see the KR thread ^^
Shinkenger was my first Japanese original, then Magiranger and then Gokaiger, but I tried watching Goseiger (and gave up at ep 10 and watched the ending and called it complete =D) I love Shinkenger the most ^^ Before that I've watched many many many many English versions (AKA Power Rangers on like, Kids Central haha) like Ninja Storm, Mystic Force (WHICH I LOVED), Wild Force, Dino Thunder (from whence the level of plot and interesting-ness started to drop ><)
I think what is amazing about Gokaiger is the way it does well where (sorry for the reference but to me KR and SS is very closely related) Decade failed as an Anniversary production. The references to past Sentai are very clear and obvious, and they even managed to get at least of the real actors back to film. The storyline/concept is strong there as well, and I won't expect them to leave me on a cliffhanger even after 2 movies attempting to tie up loose ends haha...