I'm guessing Blender, because Blender's complex UI scares many new modelers away.
It's not that intimidating once you learn a little about it, even if you're doing a full-sxale project I doubt you'll use more than half of the buttons in te ui, but then again that doesnt tend to matter to newer users, one of my friends took one look at the ui when I was just starting out on it and said "I'm never going to learn this" and he never touched blender again, a shame because he'd probably be better than me if he chose to learn it
Also pandan that's pretty cool, I think I'm going to make a pew pew spaceship now.