Been playing in this world for over 50 hours so far, just reaching the end of the first year, and figured that I should share it. I'm currently playing with Algernon's watershed and Conquest landform overhaul, and they produced this really cool ocean that is sort of shaped like a human head!
World seed is 837906835
Here's all of the mods I have installed currently just in case any of them also happen to change worldgen significantly.
Algernon's Watersheds
Betterruins
Bloodtrail
Conquest landform Overhaul
Firewood to sticks
Hydrate or Diedrate
Place on slabs
Terrain slabs
Real Smoke
Seamless Rapids
Eco Machina
Shipwright: Vessels of distant shores
Wanderer's Sketchbook