I am really, really sad and i just can't stress enough the really part, to see this discussion about armors. The whole topic just makes me sad.
I am really, really sad that it is still necessary.
as long as it makes sense for the setting it belongs to
That's the whole issue in a nutshell. A warrior wearing nothing but a bikini (or loincloth) only makes sense if said warrior is invulnerable and/or if that particular culture hasn't developed armor (or any real clothes, really) yet and/or if there are laws preventing one or both sexes (of for example a lower caste) from wearing protective gear.
*Chainmail* underwear (due to massive chafing) and boob plates (due to extremely counterproductive extreme lethality) only make sense if invulnerable and/or required by law.
Fantasy as a genre means that magic and made-up creatures exist, not that absolutely everything goes - at least not if you want the setting to be anything more than a pure joke that doesn't take itself seriously at all.
I like women looking like women and not dwarves with beards, suggesting that i appreciate armors for females to be more feminine.
This is exactly the same argument as if one were to argue for form-fitting metal crotch guards with separate compartments for each crown jewel instead of only a nondescript bulge you have appropriate freedom in. You know, I also like my characters to look good, but form follows function, so I have nothing nice to say to that view of yours, especially phrased as it is.
And why there's no topics for male armors then? How they should look like etc? Male armor appearance can be ugly as long as it's not bikini?
Erm, yes, duh? I do assume you mean "plain-looking"? It can be ugly, but it doesn't have to be for either sex without leaving the realms of believability even one step behind, let alone miles and miles.
If you mean "silly spiky oversized mess" (armors *and* arms), then that shouldn't be there, either, but being silly without naked skin *is* less problematic than being such with all vital organs readily accessible, so people do naturally discuss it less, particularly when D:OS and especially P:E have been much less guilty of that to begin with.
And I always see people on your side throwing around barechested male characters in fiction as a justification for the objectification of the female form, but never do I see them arguing for the implementation of topless or even belly-free armors for men. Quite the opposite in fact; nothing but sneering disdain and mockery for such "gay" designs (fairly common in Asian works, where they are nevertheless still much rarer than the female equivalents) other than the Conan archetype. All we want is equality.
My answer would be. If possible, make a few options for pro bikinis, a few options for anti bikinis and the rest in between. When i say few could be 1 - 2 i don't know. Depends on the workload.
If you want nonsensical armor, than at the very least appropriately abysmal stats ought to reflect the design. Wanting to ogle eye candy yet refusing to live without überstats is exactly one thing: sexist.
Never. Kill it with fire.