Hm, I say maybe try a few hair items, I imagine that the cat ears would go well with your head.
Maybe swap that relax with Tesla.
Or try new force and relax as well, like Vampire/Cobra.
Some 3D items will look nice like the Valkyrie set, Elbow pads, Skull necklace.
Maybe try new head textures.
Possibly add some gradients too.
Also, try some texture sets.
Maybe flames too.
That's all I got, I'm not the greatest help with customization but I hope this gave some ideas.