Mature, as in grown up, works of art catch my eye too, I'm not always lured in by playful colors and characters. Take for example the soft and imaginative work of D. Ray. This artist holds a BFA in Illustration and with work featured in CMYK Magazine, it's exciting to discover her Etsy store Ground Work and to learn that some of her originals are priced under $75 (such thoughtful and beautiful gifts).
Ground Work clearly has talent, her color and composition being both serene and comforting yet striking and mesmerizing. Her focus: the natural world around her. Exploring what's out there and translating what she sees into soft sensitive forms, combined with a keen eye for color, resulting in delightful works of art. She has a definite style, and though no two paintings are alike, you certainly could group a collection of things on a single wall and create such a diversified focal point as displayed in the image above.
Stunning, mature, fresh, fluid, beautiful.
(images from ground work)