I am a lover of the Impressionist and abstract painters. Can't say I have a particular favorite although I have a great love for Georgia O'Keefe's paintings from her time in New Mexico. It feels like home to me....which makes sense because I am a native New Mexican.
Matisse, Frida Kahlo, Dali, Monet........
If anyone is ever in Washington DC, I highly suggest you go to the National Museum of Women in the Arts
http://www.nmwa.org/ This is my favorite Museum in DC.