Lovely vector style dear.Sticking with the base colors really makes the character look vibrant against the background.I think you did an amazing job with placing the details in this piece. Not too much and certainly not too many.Like what you did with your Luna and Celesia drawing, I still find the whole translucent wing effect very fitting and nicely done.Don't worry too much about the background. The trick is to not be afraid to draw them and you'll see over time that they'll improve.To show of an character like in this situation, a simple background is the most efective.I've just noticed that you dot your "I" with little Mickey's. That's really cute.Keep up the awesome work!