My most favorite artist has to be Fiona Rae. I adore her style, although her name's, sadly, is not widely recognized.
A little bit about her:
Fiona Rae is one of the YBA's (Young British Artists), born in 1963 in Hong Kong.
Her preferred medium is paint, with which she creates wonderful, quirky & very abstract canvases, as you can see above.
She has participated in the infamous Freeze exhibition and also been shortlisted for the Turner Prize.
A few of my favorite pieces: