Not much to write down today, I came up with a visualization of how I expect to generate the planet. It starts off at the top with a vector and a flat tile, and then goes tile by tile to the right until 1/2 of the planet has been generated. This needs to be codified somehow =)
The length of the vector will affect the probability of the next tile being a level tile, a tile going further away or a tile coming closer to the center. The probability of the next tile being the same as the previous tile will also be high to avoid a jagged mess of very small hills.