There have been a few times on this blog were people have discussed the pros and cons of the different engines available for AIF, but I don't think we've had a thread directly about the topic
So I thought I'd address that: Authors (whether you have ever finished/released a game or not) why do you use the engine that you do? Have you tried others? What features do you like about the one you are using.
BTW, this thread is not about neutrality, this is about personal opinion. Why have you made the choice that you have?