Hello, i'm not too good with words but i know what i like in art.
Can anyone identify genre i love?

I love light clean paint sketches usually connected with concept art, but the most i love the look of Zhanglu portrait paintings, but i hate polished digital paintings of any kind that start to resemble CG models etc.

Can anyone determine the genre i'm talking about, or name some artists that paint like that. Preferably portraits.

also sorry for my bad english...