I have a good amount of seeds.
MT- Lots of Mountains and lava.
pizza- Clay clay and moar clay.
hungry- Floating island ftw
zachisnakedunderhisclothes- MCPE Ravine type thing.... with floating islands and such. Amazing seed.
iliketomoveit- Lots of waterfalls and lavafalls close to one another.
claytonson- Pretty epic in general. Kew waterfalls.