I had a lot of fun with this one last year. It was supposed to be from H.P. Lovecraft's "The Moon Bog." I wore it to class and people were not sure if I was in costume, or if I just felt like dressing a bit more formal. I thought the skull on the lapel would have been a give-away.
I don't have picture of the others, but Brody Bruce from
Mallrats has made an appearance the week of Halloween every year since 2001. My silver robot from Daft Punk was also a lot of fun to do, but sadly the paint I used reacted with the Sculpy I made the helmet from and remained tacky even years later so it had to be disposed of. I still have the LED display somewhere though.