Does "You are a person who is anxious" or "You have an obsession" sound any better?I hate terms: you are an obsessive person and an anxious person. I know what they mean, but it seems so demeaning!
I'm not sure that person first stuff makes much different. I'm fairly comfortable identifying myself as an Aspie- in the right company. It is really identifying what the other people think. Here having an interest / obsession/ passion is OK.
I'm not sure about passion as a term for interests. It implies love for. When I'm looking up the specs for gadgets- such as washing machines- to try and work out which one to get it is hardly because I love the things.