For Wilson P. Higgsbury, my Character Piece is most definitely the gloves. As with the jewelry - also bought specifically for the costume (and then some for tradition) - I kind of fell into character when I first put them on. When I finally got the ends of the gloves under my shirt sleeves and comfortably on my palms, I cracked a grin that later went into some of my better photoshoot results. At that point, I was able to really get up and started with the rest of my costume, knowing that it was going to be a complete success.
Still, there's a level of risk when getting into character. I learned this from the faun pretty quickly - Some people loved the noises and the stomping and the jangling, and many small children stayed far away from me. With Wilson, I have to worry extra about staying in character, given that it's pretty easy for me to act hyper and excitable while it's more difficult to appear restrained and scientific-like. I haven't been able to test this personality in a public setting yet, even just for posing without too much interference with a mirror, but I'm determined to make it work by the end of the con.
Anyways, happy PAX, everyone. I'll post some pictures on my Twitter today.