Well, I've 'improved the basic design... a bit. And I expanded into more areas.
As well as several recolours, I've tried out a couple of of different ideas, including crossed ticks, spiral ticks, and a colourwheel tick. The two in the bottom right hand corner are an idea that I like for a badge; a Rose. I will update this with scale versions as soon as possible.
EDIT: Smaller versions, scaled down to the correct size.
I think I may have made these too complex. In any case, you get the general idea, and I should really find a way to scale these without MSPaint. Please give criticism so I can improve these.
Also, the Roses next to other badges:
I think I like the red one best. Comments and Criticism are appreciated.