For me masking at work is more boring than it is effort. Most coworkers i've encountered are so plain that the moment you start discussing something personal that isn't the most sanitised hobby ever they get funny. Tell them you spent the weekend at an illegal rave or getting drunk at a furry convention and they start to freak out. It's no effort to not talk about this but it also means there's basically nothing to discuss.

Life's too short for bullshitting. Why not just speak your mind and avoid the people who react that way? I've found that if I sanitize my words I get sanitized responses, and vice versa. Nobody is as boring as they seem.