Neat Clean Orderly Things Work Messy Liking Simple

Not messy: clean and orderly. Liking to keep things very clean and orderly. Simple and clever. Neat can also mean skillful or effective.

He keeps his apartment neat and clean.

His two roommates are both pretty neat people. [=they both like to have things cleaned up and put away]

The big difference between today and the old factory economy is that instead of working with a drill or a machine we work with laptops and telephones. What’s neat about this work is that it’s different every day.

And in real life endings aren't always neat, whether they're happy endings, or whether they're sad endings.