Design
The questions we answer in the design category are does this look good on the shelf? does this look good from every angle?
Build
Was this fun to build? How complicated is the build? What techniques if any were used for the set?
Cost
Did you get enough build for you buck? How many pieces per dollar? How many minifigures are included?
Playability
How fun is this set to play with right out of the box? What does the set do? Does it offer dynamic narratives?