Not stroppy, but strong- minded, determined, persistent, resourceful That sounds like my DD as well.
To be fair she is, and aways has been very self-aware and realised quite young that she was far too uncompromising to ever be able to cope with a partner and/or children so she decided to have neither.
We get on very well most of the time, but now and again she gets worked up about something and I have a different view. My policy is to say nothing and just make vague noises. I then get harangued for not being prepared to have a proper row with her, which she finds very frustrating.