You are assuming the interviewer is looking at it in a black and white fashion. I was more pointing towards the more mundane goals. For instance in game develo

You are assuming the interviewer is looking at it in a black and white fashion. I was more pointing towards the more mundane goals. For instance in game development there are lots of roles including designing and developing. If I am hiring a developer and you say you want to design that is a very valuable piece of feedback that doesn't exclude you from the position. For instance it could mean that of the two positions one may be a better fit because it involves more architectural work. In your example that isn't nearly as useful, wanting to focus on your hobby is not a negative at all. An example of a problem would be hiring for a legacy system and having someone say they want to work with the latest and greatest tools. The reality is that isn't going to happen and the fact that you are going to be looking out for another job quickly means it would be better for both of us to avoid the hire (again all things being equal).