The Floral Hook (ravelry): rich, dense, decorative. Complicated and colorful floral blocks easily adjusted for any yarn/hook. Cheap patterns, somewhat difficult, but very rewarding. Freebies
Satsuma Street: colorful and cartoony with folk-art flair.
Chouette Des Forets (etsy): vintage-sampler-style original patterns themed around nature and wildlife. Inspiring use of variegated thread in example images