Very often I stumble upon some great artists at DeviantART. There are some amazing pieces of work there, from photography to sculptures and illustrations. For me, there isn't just one good style of illustration, but many.
Warren Louw has got one style that I like very much. Most times it has those classic sketch outlines, and a more realistic coloring, which I really enjoy. I really think thesea re fresh, like the portraits at the end, which are amazing. He's got many other pieces at this portfolio, which I recommend you to visit. I hope you all enjoy these, and if you know any other great artists that make illustrations as stunning as these, tell us! Cheers. ;)