I know that I am always looking for the perfect Halloween costume now that I am older. It really does get much tougher as you transition to the non-trick or treat costume. Some things to worry about as a teen:

1. Keeping It Simple: The simpler the better it seams with Teen costumes. Sometimes the overly outlandish costumes are great, but most of the time they just seem annoying.
2. Mobility: When your younger all you have to worry about is walking from house to house or riding around in moms minivan. As you get older you want to be able to move, and yes, run. (Tell me you never TPed, soaped or worse!)
3. Appeal: Of course you want to look pretty sweet...

Ideas

Venom (Spiderman) - Blends in great with the dark and is quite mobile if you find the righ size.

Glue-on Skull - This is something that is sold mainly at Wal-Mart and you make yourself. They give you paint and all the glue and you make up your own mask and then glue it to your face. Totally changes the way you look.

Ghost Rider - You can make up this costume very easily...All it takes is some black clothes and a black leather jacket. To spruce it up find a slip on skull mask and some chains. (Be warned! The chains might make a lot of noise.)

Punk/Emo/Rockstar - Again, another costume in which black is the predominate color. Catch the trend yet? This is another very easy costume that requires little sacrifice.

All of these costumes are based on the average teen that wants to take to the streets and cause as much mayhem as possible! These mostly hide your features, make you blend in nicely with the night and have a SICK costume.