I have never participated in a Cosplay convention, but if there was a local one, I would probably come up with something.
I have a SPFX Thug Mask that was modified to resemble Gimli the Dwarf from Lord of the Rings:


And this is the actual Gimli makeup from LOTR. (I know, mine is bald, but a full head of hair would have been outlandishly expensive! I was going to wear a helmet anyway)

And this is my video (skip towards the end to see the mask in action, kind of a long video):
I don't know if anyone on this site is interested in this stuff, but I was hoping we could share ideas for costumes and share other Cosplay photos that we think is cool.