In particular I enjoy seeing landscapes done in thick oil paint. Over the past year I have learned a lot about this from Brad Teare on his blog titled "Thick Paint". Whenever I have time my hope is to delve deeper into thick paint with my landscapes while I'm headed more and more into watercolors and digital for my children's book art.
Another artist who I would have to give credit to for helping me in my understanding of landscapes to some degree is Elizabeth Tolley. I picked up her book "Oil Painter's Solution Book : Landscapes" a couple years back and bring it out in the field with me. Excellent book on many levels!