Among my gifts from my fiancée's parents this Christmas was this phenomenal little Metal Earth BB-8 Metal Model Kit. I finally finished building him this afternoon, and I must say I'm mighty impressed.
On first glance, he looks to be a pretty straight-forward build - but the simplicity of his shape belies just how tricky it is to curve all of those metal pieces into a single sphere-and-dome combination. Nevertheless, I found him to be an incredibly fun build of just the right duration and complexity.
While I haven't picked up a huge number of Metal Earth kits, a strong droid focus does seem to be emerging. He'll go especially well with the K-2SO and R2-D2 I've previously built!