people who say ninerose is strictly platonic aren't realizing that they just have a hypocritical problem with age gap. i'm saying hypocritical because those people generally have no problem acknowledging tenrose as romantic just because david tennant's forehead isn't wrinkled. but they're forgetting that the doctor is still over 900 years old and even if he wasn't, tennant was still just a few years younger than eccleston. so if you have a problem with one, you should have a problem with the other.
and i'm saying this as a ninerose shipper cause if you think rose was too young and it's weird for them to be in a relationship? ok, fine. we all have our triggers. i personally have a problem with edward/bella (twilight) and stefan/elena/damon (the vampire diaries), because the age difference is fetishized, not really written as something as problematic as it should be, and also, elena and bella are teenagers.
and ok, rose might not be donna's age, but from 17 to 19 a lot happens in your head, especially for rose who already has a job and who takes care of her mum. bella and elena are both financially stable enough that they don't have to "grow up" faster and worry about if they can make ends meet. they're still in school.
and, moreover, the doctor doesn't make it weird. he doesn't obsess over her sexually, doesn't groom her, and is aware of the age difference.
but it's also not like he has a choice: his entire species was decimated, and even when the time lords were still here, they were pretentious, elitist puritans and the doctor was basically the autism specimen who was always more curious and open-minded than the rest of his peers. he always liked human beings in a totally healthy way (I'm talking about humanity as a species, not individually, cause i know he had some weird toxic friendships but it's not about that).
he likes humanity for how fleeting our lives are. we are ephemeral and it gives purpose to our life and the doctor loves how it acts on the way we live it.
he hates soldiers cause they go against what he thinks is our nature (a need to create and witness art, a need for the other) in favour of capitalism, stupid political conflicts. soldiering treats life as less important than those stupid and, in the end, useless concepts, and the doctor loves choosing and interacting in general with people who understand that. people whose curiosity exceeds their love of comfort and fame. like rose.
he didn't choose rose because she was pretty, or young, or because he fetishized her and was weirdly obsessed with her. which is not to say their relationship was without fault, cause it was (there's a reason rose got stuck in that parallel world in the first place and sorry to tell you this, but the reason is mainly the carelessness of tenrose), but it wasn't toxic in its essence.
so yeah, you're allowed not to ship ninerose, it's ok, but don't call it platonic or weird cause it's not (tenrose was actually way more toxic).
for starters, no one looks at their friends or, as people like to call them, "parental figure" the way she looked at him. then, people kept acknowledging their relationship as romantic (calling nine rose's boyfriend and calling rose nine's girlfriend). rose showed jealousy when women displayed romantic/sexual interest in nine (jabe, lynda etc...). they literally shared a kiss on the lips. even jackie ended up accepting the nature of this relationship, and she was very protective of rose. and to finish up, rose herself called their first adventure their first date: "our first date. we had chips".
so yeah anyway. they're in love. deal with it. if you don't have a positive opinion on them there's something very simple you can do about it: to keep it to yourself or if you really can't help it, you can also learn to tag it correctly so i and other ninerose shippers don't have to see it :)