For some reason that I've not figured out yet, my prints with S3D have blobs on the exterior.
This 'marvin keychain' test print makes it pretty obvious. It's a tiny print photographed with harsh lighting from above, which makes it exaggerated, but as you can see, while most of the surface is fine, but there are blobs sticking out that make the print look terrible. The same model printed with Makerware is fine. In general I prefer S3D, but I'd really like to get this figured out.
Printer is FlashForge Pro running Sailfish. So no active cooling - thus the dropping on the loop of the keychain. That I know how to fix. But those blobs are just weird.