To my mind, the question about being passionate about all of my clients is different from the question of do I practice in a particular niche. As I said in my earlier answer, I AM passionate about all of my clients because I do some analysis and selection BEFORE I take on a client. If I feel that we do not match, I don’t take them as a client. Therefore, once I take them, I’m fully engaged with them and I am passionate about helping them.
Separate from that is do I practice in a particular niche. Yes I do. But I don’t think that precludes me from working with general fitness clients as well. An analogy to medicine would be an Internist who “specializes” in a particular medical disorder, yet also sees general medicine patients as well. I specialize in working with female athletes of all ages. Improving sports performance and perhaps more importantly, reducing their risk of non-contact knee injuries is my “specialty.” I have a ton of experience in this area and am specially trained. However, I do LOVE working with clients with other issues and challenges. In my opinion Rachel is correct in that to be really successful at what we do as trainers, we should specialize in a particular area. However, with that being said, I think that working with other clients (with GENERAL FITNESS needs) outside of your specialty area, keeps you engaged in all aspects of this huge world of fitness that we are involved in.