I like the color choice you made on her skin tone very nice, the feathers are beutiful.
I really like her outfit and I'm a sucker for red hair, the only thing though is her hand it looks a little dislocated, anyway 3.5 starts i really liked this.
Fantastic work, the character design and her confident pose work great together.
I really like the choice of background, it helps emphasis the character and makes the warmer colours stand out. So I wouldn't worry about it being perceived as "simple".
The only thing I would note is that the white outline around her is uneven in one or two places; (under the elbow for example) but this is a minor thing and doesn't jump out unless you look for it.
Thanks for you're review! It looks like I can't rely on the vanilla stroke function on PS.