I’ve gotten very very used to being asked for titles on forms and the like. I’ve gotten used to respecting other peoples’ pronouns.
I have not gotten used to being asked for my own, and I don’t like it.
I understand that you can look just like me while having a gender identity that does not match my own—some men like to present in a feminine manner sometimes while still being men, and some people are non-binary, third gender, agender, etc. but might still dress in a very feminine way for whatever reason. To cover all your bases, ask pronouns, because guessing “she/her” at a feminine presentation in a body with a feminine shape won’t always be right. If you want to maximize your chances of being correct, you need to ask.
But whenever I’m asked, I also wonder if I’ve presented in a way that signals anything other than “woman” (which frequently but does not always line up with feminine presentations from feminine bodies). Did I just totally fail at presenting the way I want to and if forced to assume you’d guess I’m third gender, or are you being inclusive and considering that people who present like me aren’t always women? It’s the privileged, cis-woman version of “did you have to ask because I failed hard at passing, or did I pass and you just ask everyone this because not everyone conforms to the gender binary?” I’m really used to my gender being assumed and assumed correctly, and am not comfortable with people being unsure or even assuming wrong. I’m basically getting a microdose of what many non-cis, non-binary, and/or nongenderconforming people have to deal with, and I don’t like it.
I also understand it is probably for the benefit of most people (I’m aware of some non-cis people also disliking people asking pronouns, with reasons being along the lines of “please assume, I’m a binary trans person and asking makes me worry I don’t pass” or “I’m in the closet right now and asking my pronouns makes me choose between outing myself and misgendering myself” and it’s worth finding some solution for this) for asking to be normalized, so I let my personal discomfort and dislike go. After I ask if they asked pronouns because they honestly thought it’s super likely I don’t use she/her in which case oh god what do I change so I can make the assumption be that I use she/her, or if it’s just them trying to be inclusive and cover all bases which is good and respectable.