I don't have a lot of space to store my scenics between games, so I don't base my buildings. The main drawback is that once on the table, the buildings are too perfect.
I painted up several additional building bases from Pardulon,
http://pardulon.com/ . They greatly enhance simple buildings by breaking the ground lines.
![](http://perronny.free.fr/WAB/imgfig/DA_PardBases1.jpg)
![](http://perronny.free.fr/WAB/imgfig/DA_PardBases2.jpg)
It should be easy to do the same from scratch, but they are rather cheap and some of them have interesting details such as barrel, wheel, etc.
Olivier