Given that we're gearing up for a default comment, let's get some community input on what the best comment for describing our sys-req questions should be.
I'll post some of the ones we've used as answers. Upvote and edit the best.
As this is a system-recommendation question, please adhere to both the [FAQ] and the rules for subjective questions as outlined in Good Subjective, Bad Subjective and on our meta. In particular, all responses should be based on actual experience and contain references and examples whenever possible.
###System Recommendation As this is a [tag:system-recommendation] question, please adhere to both the [FAQ] and the rules for subjective questions as outlined in [Good Subjective, Bad Subjective](http://blog.stackoverflow.com/2010/09/good-subjective-bad-subjective/) and on [our Meta](https://rpg.meta.stackexchange.com/a/1071/760). In particular, all responses should be based on actual experience and contain references and examples whenever possible.
Please answer this question following the site guidance on game-rec questions - "you could do this, I suppose" is wrong, "I have done this and here's what I did" is right. meta.rpg.stackexchange.com/questions/1070/… Expect to be downvoted if your answer does not include personal experience or a relevant reference.
System recommendation questions must be tightly scoped to be allowed on RPG.SE; see our System Recommendation Q&A Guidance for more. Closely define what you need and then answers must follow "Good Subjective, Bad Subjective" criteria and only recommend what they have experience in and not just toss out Googled lists.
Answers to this question should conform to our game recommendation question guidelines - you should be posting games you have personally used or seen used for the purpose and providing detail on the results. meta.rpg.stackexchange.com/questions/1070/… - simply listing games you have heard of/pulled off the net is a downvotable answer.
Just a note folks, remember that our sys-rec questions require a good subjective basis. You must have played the system within the context of the requirements to recommend it. Please consider all the requirements before nominating your favorite system.