As Dumb Baby mentioned...

I would love to see game parameters available when one creates a seed...

Options I would love to see upon creating a seed including (but not limited to)

1) World hopping (yes/no)
2) Portals (yes/no)
3) Permadeath (yes/no)
4) Tutorial (yes/no)
5) Ore/ingots allowed through portals (yes/no)