I would have to say that the best costume would have to be Micheal Myers because he is basically the best scary movie character ever, so I would go with that costume.
Costume Castle or Costume express
it depends. if you like dorthy then it would be a good costume. if you just wanna wear something cute then yes, it is a good costume.
You can find a good hippie costume at costume express. They carry a bunch of different costumes and they are just a costume store so they would be the best place to look for your hippie costume.
A good costume is something like a devil or a vampire.
well its a bit obvious! Angel and devil are good or if not then look on the internet for costume ideas or look in costume shops
For Halloween I always prefer something scarier :)
Cosplaytrader.com is a good start! Alright you can make a costume or go to the good will and find a nice costume or you can find some clothes that would go with you costume a kid i know did that and went as a pirate!
The traditional South African or Zulu dresses are a good costume for the Rhode Island.
A good Spiderman costume is a costume that resembles the character. You can make it yourself, or buy the costume, as it can be purchased from places such as http://www.spidermancostumes.com/. Including some accessories can give the outfit some extra oomph.
Fairy costume dress & wings
Its an awesome costume you should buy it. Yes, if you like the costume, you should buy it.
The Grand Heritage Elvis Costume would be a good costume for a 14 year old boy.