All bark and no bite!
RuinValor C# SlimDX Voxel Model Design
The tree on the left is kinda the shape that I would look for and we would have 2 - 5 different types of trees. This way it would give the idea of being volume based when you traversed a forest. The key to this is maintaining a style that matches the voxel theme. Let me know what you guys think. I should have a 3d model within a day or so to post up here as an edit.