My Cosplay:
Just to be clear, I have never cosplayed before. Halloween costumes were store bought and usually meant to be fun and generic. I was adamant on doing a character from a show or game that I least watched/played and not some character that I had "heard of". So that was important for me.
For my first ever con, I wanted to ensure that there was some sort of "put it together myself" component involved. So I thrifted/purchased most of the individual details of the costume (which was not elaborate and not expensive) and it was actually a lot of fun showing up my thrown together costume. It was much more gratifying than purchasing something ready-made in a "usual" halloween store.