My friend wasn't too crazy about patterns but one day, when we were at Zara, I pointed out this beautiful dress that had a splash of beautiful summer colors and a nice pattern.  She was hesitant but it looked great on her and she thanked me later because she received a TON of compliments.
  I used to never wear clothes that had a remote pattern or design.  I preferred bold colors/shades, mainly black.  But, ever since I tried on clothes that had some nice patterns and designs, I love em, especially dresses.
  I haven't checked out this year's selection of dresses yet, Lise, but my normal stores are:
Zara, Reitmans, Smart Set, RW & Co., Dynamite..
Last year, I purchased two beautiful cute black dresses from Reitmans. 
  Good luck.