I started a new job a month ago. I have always been quiet and shy and this is my first job after university. I have made a lot of effort to talk to my colleagues, join in with small talk, laugh along with the jokes, etc. In my opinion I came across as average - not particularly talkative but also not completely silent. I know being shy is my natural default state though so it takes a lot of effort and energy to sustain this kind of state, especially when I'm with the same group of 6-10 colleagues all day everyday. I cherish the time where I have to go off on my own to do a task and I can just be silent.
All that effort is not enough though as a senior colleague keeps saying how quiet I am. He asked me why am I so quiet and I just kind of brushed it off, but today he introduced me to some colleagues I hadn't met yet but saying "this is [my name] and she is very quiet". Then he was explaining to us all how sometimes we may be changed into a difference team/office e.g. to provide cover for someone and then he said "for example, if I wanted to move [my name] because she is so quiet!" and laughed. He is kind of saying it in jest but it makes me feel really upset and uncomfortable as I feel like I'm not a valued team member but just some awkward mute.