@tobyers Not sure if it was you that spawned into E31N6 about a week ago, but that room was not great and my bot cleaned it out pretty quick.
When you are looking for good rooms. Try not to think too much on small Access points as they are no problem for an attacker to navigate. Think more about how you plan to grow and to do that you need Energy. So a more Ideal room is one with room to build in with 2 Sources with connecting rooms next door also with 2 energy sources in them all. That way you can expand into the neighboring rooms from your main base, pulling all the resources back to your main room.