I left my previous job working on the build system for this, and for now I am doing similar for this.

The possibility for growth is higher with my new employer, as it will be their first MMO. I'm hoping to blend my build knowledge with my previous work on servers/storage. A definite advantage is that I worked with the producer before, so he already knows what I can do and trusts my decisions. It helped in my choice when other companies were also in the running. I get to hit the ground running here for the most part, without having to completely start from scratch on trust relationships.

What made the decision difficult is company stability. My previous employer was probably more stable then where I am at now. In the end, I felt it was worth the risk though. And I'm hoping my new environment will be a bit more receptive to change, as there isn't a legacy here like there was in my past job.