I rather have my gender revealed, so that people can know which answers to offer when replying to my posts (even a feminine username doesn't necessarily specify one's gender, although my username isn't feminine). When replying to people's posts, the responses you give can make a difference if you know the gender of the person. This also includes age and nationality too. It saves you from having to keep revealing your info in your posts or other posters having to keep asking.
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Female
Aged 32
Diagnosed with ADHD
Have RSD (Rejection Sensitivity Dysphoria)
Have Anxiety Disorder
Diagnosed with mild ASD but I don't identify as autistic