I am fascinated by Mars and the idea of Terraforming it. Both on a real work level and a Science Fiction level.
The other day I created a terraformed Mars in photoshop and created a new terraformed Mars in LightWave. This like the second or third time. There will be a fourth. The next one I want to spend a lot more time on. This time I want to focus more on the actual terrain and where the different areas of desert, rock, and vegetation covered area should be.
I also will be Terraforming Venus at some point.