I like team super forms where everyone has the same one and they can activate it at the same time.

I forgive Shinkenger for having 2 power ups that only 2 rangers can use at a time, since they were shared and don't feel like a "red ranger" toy that he chooses to allow other members to have occasionally (thought that would make perfect sense for this season).

Something like Abareranger/Dino Thunder's Super Dino Mode or SWAT mode I like.

Daigo's Carnival form and as cool as Yamato seems, ZyuoEagle's form hogging are examples that I just hate.

I don't really have much of an opinion on them, sometimes they're cool and sometimes they're eh. I do prefer when the super forms can be used by everybody, because when it's Red-only, it promoted Red focus. From a visual standpoint, I think my favorite is Super Shinken Red, but I haven't seen that series so I don't know how it works. Function-wise, I haven't seen enough modern Sentai to really judge (I prefer the older stuff)

I love team forms, but I'm not a huge fan of red only forms. I don't mind when it's one power up that's supposed to be shared by the team, however. I think my favorite is probably SWAT mode. It just looks so natural with the rest of the suits.

I think if done well they are good. Perfect example are the Super Gekirangers. I love the suits and I love how they dont just have a few extra plastic armor on their base suit. THEY WEAR COMPLETELY NEW SUITS. Head to toe. Also the debut of those suits and powers were perfect at the time. Second best would be the Dekaranger swat modes. Really like how they do not look like tacky add-ons and make the existing suit look more tactical. Another favorite of mine are the Legend Magirangers because I love the redesigned helmets and other than having a redesigned helmet and chest armor mainly it works out well.

Do we have a sentai based on Animal Kingdom ?

Zyuohger. Last year's Sentai. It's a good show too!

It's a shame we never have a insect-themed sentai.

I've been saying that for years. We've only gotten 2 beetles for Gobuster and 2 beetles for Hurricanger and their beetles mecha. Also, there's the 2 B-fighter kabuto for metal heroes. I guess they don't want to overlap with riders, but we haven't have a bug rider since W and OOO's Gatakiriba forms. The last major insect theme rider series would be Kabuto and before that we only have Kuuga, Agito, and Blade. Japanese kids used to love collecting bugs and Pokemon was suppose to be a game that uses bug catching as a base, so city kids can enjoy bug catching too.

But the insect mechas could have vehicle motif like of the Gouraijers or could be living mechas ?

What are generally considered the best seasons from Gingaman through Boukenger? I don't really hear much discussion surrounding those.