These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Senran Kagura
Critical Backlash: Let's just say reviewers don't give the game a decent grade and leave it at that while the average gamer seems to give it more positive scores.
Foe Yay: All of the rival pairs have this. Mirai vs. Yagyuu, Asuka vs. Homura, and then there is Yomi vs. Ikaruga, which takes the trope to its own whole new level.
After the events of Burst, Yomi and Ikaruga's relationship even begins to look Like an Old Married Couple. The whole act; it's just that the light bickering (about food, most of the times) tend to use a claymore and a nodachi to be resolved.
Ho Yay: Tons of it, with some couples being more of less official, like Yagyuu/Hibari/Haruka and Miyabi/Imu. Yagyuu is very much obsessed with protecting Hibari, the Haruka/Hibari camp has gained quite a momentum with what happens in the anime episodes 9 and 10, Katsuragi and Ikaruga are Tsundere toward each others, Katsuragi wants to see Hikage enjoy a good fight with her and Mirai is obsessed with gaining Yagyuu's attention. And then we have the main couple : Asuka/Homura regularly border on Ho Yay too since they upgraded from Foe Yay in the first game, although the concerned parties don't seem ready to admit it yet for the time being.
In Shinovi Versus, both call each others their "super best friends".
Homura reluctantly conceded that Asuka is not her property. Yumi wasn't fooled.
Asuka was more than just upset about Miyabi badmouthing Homura.
Hikage is in 'the mood to fight' for Katsuragi only.
More Popular Spin-off: The Vita spinoff Shinovi Versus has outsold both main series installments combined. The reasons are rather clear as a Dynasty Warriors style 3d brawler is easier to play, far more fanservice (clothing damage doesn't stop at the underwear/swimsuit anymore!) and more characters. The release also coincided with the slashing of Vita's price in Japan. (It was originally a Crack is Cheaper kind of game console.)
That One Boss: The mission "What Doesn't Kill Me" in the Hebijo storyline has you fighting Homura as Haruka. She will not allow you to just keep your distance and hold her down by repeatedly throwing neurotoxin at her. If you try to do so, she will rip your clothes off so fast that you will not even have time to think before your neurotoxin is gone.
Heck, any mission where you fight Homura is bound to be harder than normal due to her being an extremely fast Lightning Bruiser.
The Scrappy: Yomi and her ultra-grating bean sprouts obsession. This is even lampshaded by Hikage, a fellow Hebi.
What Measure Is a Non-Badass?: Hibari might be significantly more capable of fighting compared to your average joe, but she's ridiculously low on the power level compared to other shinobi. Adding the points that she's pink, her summon monster is a rabbit, and she's moe, many people find a scrappy in her.
Haruka is the first to perceive Hibari's strong points: she is more suited for information gathering and 'spy' work than direct confrontation. But even she can still kick ass (more or less literally) in the games.