One easy way to add some more punch to a look is clip-in extensions. I wanted to get a big streak for a long time, but could never decide on which color to choose, so I bought some neon extensions. Most of them can be easily curled by wetting them and leaving them in a roller similar to the diameter of your curls overnight, then you can cut them to the length of your hair and clip them in for an easy style change.

Websites like Etsy have some really fun and unique ones:

BOLD N LEOPARD 12 Inch Long Clip on Animal Leopard by SassySwank

Also, combining straight sharp bangs with freer curly hair or waves and bold color can look good. Here's some hair styles to maybe consider:

or this gallery of curly scene hair, not exactly emo/goth, but similar I think to the photo you posted and you could add in more dark colors instead:
Maggie (littleblackcherry) on we heart it / visual bookmark
CG as of 19 April 2012

2c/3a botticelli
Low Porosity, Low Elasticity, Medium Density, Medium Texture

CO-wash: JASON Normalizing Tea Tree Conditioner (Silicone-free edition), Giovanni TTTT
Scalp Treatment: Alaffia Neem & Shea Scalp Recovery Conditioner, Brown Sugar, Jojoba, and Tea Tree once weekly
RO: L'Oreal Eversleek Intense Smoothing Conditioner
Gel: Aloe Vera Gel
Second day: Lavender mist & Aloe Vera Gel