Ruffles Adventuring

Hi all! I'm really excited to find a KAL for my Yuletide knitting. I've already knit one Ruffles and am starting on my second, but I was wondering what others may have found in their expereince regarding appropriate yarn. The first I did was in a DK wool and it turned out lovely, with smooth sexy spirals. Then I tried to make a second in some acrylic fuzzy stuff(Patons Davina) and it seemed really flat and not curly enough...so I started over in a beautiful cotton/viscose/polyester twisty, eye-lashy Italian yarn (Kertzer Beaux) but it seems that there are too many slubs etc. detracting from the simplicity of the pattern. What have others thought. Should I go back to the wool and just play with colour or do any novelty yarns perform well and not detract from Ruffles?