I really like the city. Is that a plane?
Though the light painting may be a little overused, I suggest using it in a way like this guy
http://www.flickr.com/photos/89426829@N00/1684861558/
Use the light painting in a different way to not yield the same results all the time.
Hope I helped.
Added two more photos.
Thanks for the advice diego :)
I'm gonna be doing some bigger and better things don't you worry :P this was for my portfolio to show that I know how to use a camera and crate some effects.
The green line in the pic is the meridian line from Greenwich Maritime - GMT, and it shows the curvature of the earth
http://wwp.greenwichmeridian.com/