Pitfalls of Building the World You Want

Namely, that you can build a world you love so much it's distracting. I was reading about Neptune again, because it's the closest analogue to Sleipnir's Mama Loki, and stumbled across this image on Wikipedia: 



And have just been staring at it for the last few minutes. Scramble and shrink the continents and add a glorious pair of white rings to Earth, put it in orbit beyond Neptune's Roche Limit, and you pretty much have Sleipnir orbiting Mama Loki.