Hexagon is probably the easiest to learn... and is the only modelling app i know how to use... i found wings and blender to be confusing and hard to understand... lol... i'm not great at this 3d modelling thing... also... there's a huge wealth of tutorials and forums for help with hexagon... so it was easy to find help with it...
Sorry my models parts aren't working out as we'd hoped... that kinda sucks...