How far would put your convictions/beliefs first?

When do you think you’d need to use pronouns though? Certainly not when you're actually talking to the person.

I wouldn’t start to treat a male as if they were female and vice versa. I wouldn’t go so far as to tell them they are not the ‘gender’ they think they are, but neither would I go along with their delusions. Just like I wouldn't pander to someone with anorexia and encourage them to continue to believe they’re overweight or need to lose more weight. Neither would I tell them they’re too thin!
Honesty is so so important towards people with a mental illness, not collusion.

I would put personal relationships first every time. I also think that some flexibility might actually help people see your pov in the longer term- falling out about this sort of thing just entrenches people’s positions.

it's difficult. My immediate reaction would be to use their name as often as needed rather than pronouns. Name? well names don't bother me because i cba with gender stereotypes.

gifts? what's your usual thing. With me and sibling it is either money to get something they choose for themself, that they want, or if they ask for a specific thing and it's in budget, i get that. I would probably hold my nose and buy what they ask for, but if they don't ask they get money and can please themselves.

I wouldn't want to be cut off from my family unless they were really dreadful people.

edited as realised it's a niece/nephew. Same really i guess.