Serious Questions About Mirroring Replies

I might be the most annoying rpers ever, bcs I don't like the term of what most people said as 'mirror', I like people who are not only match my length & style but also put effort to develop the plot of the story, I hate if I have to think from the beginning in every replies...
For eg : when I wrote A-B-C, I don't want their replies by just respond my chara action in ABC, I hope they write BCD so I can continue to CDE, etc, lol wth am I saying? bcs for me it can be irritating when I purposely drop cliffhanger on my post with hope my partner continue it but their response just stop right in that cliffhanger too, and another example in , most submissive chara rpers tend to let the dominant take control, they like "just do anything to me I'll follow you, I can keep up with anything" but in the end they only let you be the one who think for everything... /sighs/

Personally, I can do different styles when I get the muse.
A few descriptive lines, a whole word document.
I usually mirror just so they don't feel pressured at all.
I don't mind how much they can write. Usually, when
someone suddenly sends a big reply, I'm taken back and really
have to think it through, so yeah, it's all about what feels natural to you.

i prefer to have someone that is able to mirror my style/length-
for example, let's say i have a like, 8-10 line reply. if someone were to reply to me with a 2-5 line reply, i feel less motivated to reply to them back.
its like sang, at say- if you seen our replies-

i honestly don't do mirror replies
i just squeeze out whatever i can from the respondents reply and work from there tbqh

When it comes to mirror replies, I take forever because i constantly edit my paras PLUS I'm really slow at replying so I give them my all in these replies.

To put it simply, it's because people want the same amount of effort put into a response as they put into their own reply. If you write five descriptive paragraphs and you put thought and effort into it, but the other person only replies with a paragraph it comes off as though they don't care about the plot as much as you do, initially. It can feel like a waste of time. Like if you write a five page paper and did the best you could, then you teacher takes a glance at it and slaps whatever grade on it. That's happened to me before and I was like what was the point of me doing it if you don't care to actually look at it.

Personally, I don't stress it at all, but if we have an agreement to rp with a certain amount of length I expect nothing less when we're starting out. When I get comfortable with your rp style and I know what your best and worse looks like I don't care if I write eight lines and you reply with four, because I know you'll get back into detail. I don't think mirroring is bad to start out with, but it's not something someone should hold onto after a few replies. Did I answer your question?

i think it has more to do with knowing another person's capability - speaking from experience, there were times when i would offer to start and my starter would be 15 lines. i receive only half of that back. It's not a problem if it's packed with detail but theres often a higher chance that there's less action to carry the plot forward. more is always welcome, but 'mirroring' is mainly to counteract 'getting less than what you give'.