Secret powers! Did you want me to find all of the notes? I believe that one was only for episode 7 :)

I really enjoyed Kyuranger, Bioman, and Dairanger. Even though Dai had about 15 awful episodes, the rest of the series was so good it made up for it. 

Zyuranger was just meh (I prefer MMPR season 1) and Battle Fever J, while not outright awful, was pretty clunky. 

That would be amazing if your secret powers can find them kamsamnida!

I think Dairanger would be in my top five official Sentai. I don't mind the three Gorma stooges stuff, nor the polarising ending. I just really don't like Kou. Luckily those were the days where the sixth ranger wasn't in every episode following their introduction.

Admin got me into Gokaiger, I'm a total Sentai newb so asked for a recommendation, glad they did, because I dont think ive binged a tv show so damn fast, it was great! 

Until I watch another series (open to recommendations wink wink nudge nudge) a least favourite. 

Favorites
Sun Vulcan
Gokaiger
Dairanger
Carranger

Least Favorite
Ninninger
Gaoranger
Goseiger

Damn, I am not sure if whether I qualified to vote for the best and worst Sentai series since I haven't watched that many shows. But here it goes.

Best

Kyuranger

Megaranger

Zyuranger

Dairanger

Ohranger

Abaranger 

(so far guys)

Worst

Carranger

Dekaranger



Rest of the series I have watched: Timeranger, Bioman (currently watching), Kyoryuger, Boukenger, Kakuranger

Right now, I'm very close to finish Ohranger and Carranger (how come it's not available here?) and the others I've finished are Kyoryuger-Kyuranger and Goranger-Kakuranger. That's 23 Sentai for me, almost 25.
I know I haven't watched all those aired between 1997 and 2012 yet, but I'm on my way.

Favourite(s): Dairanger and Kyuranger
Least favourite(s): JAKQ, Denziman, Goggle V, Jetman, Ninninger and Zyuohger

@Kyuryu Gay (interesting name btw) I have heard that JAKQ was the wast Super Sentai series and was finished with only 38 episodes due to the low ratings, so that makes sense ;). I am curious about Jetman though since a lot of fans have said that Jetman was one of the best though I can't say anything for myself since I have not watched the series and I don't want to watch something because of the hype that's going on...but I am sure one day I will.

Sorry, some HTML incompatibilies. Here:
"May I explain why I didn't like Jetman? Be kind and open-minded, please.
There are some pretty bad episodes: the one with the diamond Jigen (aweful), the tomato one (embarassing), the elephant time machine (lame)... And the one in which Gai won Grey's gambling challange with Tetraboy tilting the casino... But none of them inside noticed it, EXCEPT for the ball: some really big BS happening. Wasn't this supposed to be a serious Sentai?
And I don't know why introducing big bad villains that last for only two or three episodes. Empress Juuza's Semimaru was a big fail, a useless story arch to me. Vyram is probably the least developed villain organization since, uhm, Goranger's Black Cross Army, maybe? We don't get to know a thing about it: how it started, their individual origins, we don't know how they brainwashed Rie either... And the majins served ONLY for Gai and Kaori's love story and their scenes were pretty lackluster too.
Speaking of wich, I appreciate the love triangle idea, but Gai was quite abusive towards Kaori in the first half of the series; I mean, he literally assaulted her with a kiss (or more than one?)... That's pretty dangerous, I don't know how a girl could fall in love with a guy like this. Most of all, Ryu... Well, a love triangle works if there's interest from two guys (or girls) towards a girl (or a guy), but Ryu has ABSOLUTELY no interest for Kaori and their first "date" is aweful: you take the girl who has a big crush on you to the GRAVE of YOUR SUPPOSEDLY LATE GIRLFRIEND? That's definitely the WORST way to tell someone you're still in love with someone else, it's literally the hugest crime of them all  And he's surprised how sad she felt afterwards too.
So, Ryu is an unaware ass (I despised him most of the time), BUUUT writers really thought it would have been natural to start the Ryu-Kaori romance completely out of the blue at the VERY END of the series? You serious? Jumping off all of the romance between them?  Most of all, I personally think Gai's death is totally random and inappropriate. They survived countless monsters and tough enemies and then Gai dies because of a thug at the last minute? Didn't he know that hospitals exist? Uhm, plothole anyone? Sure dying at his best friends' ceremony is the ultimate priceless wedding present ever, something impossible to forget...
I mean, I expected a lot from Jetman, judging from its fame. I'm just disappointed. I liked Turboranger's second half better..."

@Kyoryu Gay Hah yes, I know it was a pun for Kyoryu Gray, just found it interesting that's all. Honestly, I have not watched Jetman yet, all I know is that everyone is highly praising the show then again I hated Dekaranger so much even though it is also praised just as much. Now for disliking it for some episodes to be lame or ridiculous is not enough to put it on the worst shows list, if the experience is overall disappointing then I could possibly relate. I will let you when I will start watching it.