Take one fabric with 8 repeats ..... repeats should not be less than 12 inches or more than 24 inches. Use a fabric you love .....which shows movement from flowers/animals/shapes ..whatever ..... just make sure there isn't too much background showing as it doesn't lend itself to a good design. Avoid straight lines too. Large florals or large moving designs work great.
Acme staff are here to help you pick a fabric if needed.