My first Death Star Trench was ok in my opinion but the trench's floor was Really plan, and just boring. So I needed to fix that.
Since the floor was really a road, there wasn't any pieces to stick Lego too, so I stuck together every grey coloured plates I could find and eventually had a larg enough platform to stick things on. And then obviously I started randomly placing pieces like tubes, grates, smaller grey plates/bricks, and other mechanical looking pieces.
And now I am alot happier with this version then that old one.