Write your own song.. Sit down and take a stab at it. Then sing it. Its all you baby. All the lyrics are yours to give life. Not influenced by the vocal range, technique or style of any particular singer. If you're already doing it then do it more. I guess the more you do it, the more you'll find out abt the unique quirks in your voice. Example being Bjork or The Cranberries' lead singer. Finding that you'll be able to really develope your own style.
I've learned a lot by doing this. Trying my best to sound as good as I can my own way. Trying to project a particular emotion with my voice. Guess knowing proper vocal techniques help but I always find that methodically breaking down singing takes the entire romance and the whole wonderous magic of singing.
You have a wonderful voice. There are definitely ppl out there who can give better technical advice than what I just said. Try and not get too lost into the somewhat 'mechanized' world of falsettos, head voice, diaphragm breathing, SLS or whatever.
(Pls dont anyone flame me for that comment)
After all.. you got me on this song.. It's good enough for me