I don't think most people have strong feelings about calling someone whatever they wish, as that is just politeness.  But if one wants people to respect them, they have to show respect too, and trans activists need to be careful about imposing their world-view contained in the language of trans theory.  For example, many people object to being labelled "cis-woman" or "cis-man" as if we all embrace the underlying premise that we "identify" with a gender rather than being one or another sex.  Indeed some of the people objecting to the the prefix "cis" are people who support trans rights -gays and lesbians, intersex, and feminists -and they all have legitimate arguments.  There may be people who do self-identify as "cis-gendered" but it's not respectful for trans people to carelessly modify other people's identities with the addition of the prefix "cis" unless that's what they identify as.  The neutral descriptive word for people who are not trans would be non-transgender.