@rosesinthebush said:

and sketchymick i actually wasn't aware that that option was even available, that i could just delete the excess around my circle....

It'll work for any shape. One thing I forgot to mention is that if you do use the smoove tool in this fashion, take care not to lift or lower the edges of your circle, otherwise the edge of your hill won't be flat anymore, and won't join in nicely to the rest of your model(although you could use TIG's drop vertices plugin to drop all the edges back to the same elevation again if you wanted to do it that way).

You can of course modify other geometry using the sandbox tools. For instance, make a dome, then use smoove on it to deform:
domes.JPG

or even make some custom domes using the cross-section of your choice:
saucer.JPG

oh god, it's actually pretty embarrassingly bad this time! 😄 alright i might, for the sake of the community and all

Geometry 'sticks together'.
Draw a face.
Draw another face that touches it.
Select just the first face and Move it.
Parts of the connected face will distort as you do so, because they are also connected to the first face.
However, had the two touching faces been inside their own groups then they do not interact.

As Dave says, you have given the 'slabs' insufficient thicknesses.
Walls are anywhere from ~4"/100mm to ~14"/350mm depending on what they are made from and their function.
Floors and roofs will be about 1/10 of their 'span', down to about 1/20 depending on their materials and function again...

Speaking of skewed lots and buildings. While in college I rented a cheap little house that was built on a circular street (a church was in the center circle). It was a very narrow pie-shaped lot. The main room was pie-shaped. With crossing ceiling beams it was sort an optical illusion, as the room looked bigger or smaller, depending on where you stood. Very funny.