I've been viewing your gym leaders posters series, and aside from them being great pieces if art, I, as a person who's fav game is Pokemon, really really love the idea of these posters. I could imagine this is how a Pokemon gym in irl would operate, they have to advertise, and they promote their gym leader as their 'celebrity' or drawing card, so that's why they have a great shot of them, like this one of Winona. And I love those details at the bottom, such as the opening hours; they just add another dimension of reality to these pieces.
Np, if you do another I'd suggest Falkner, Sabrina or Wattson, but honestly just do whoever you like. At the end of the day your heart has to be in it, and whoever you do, if you do another, I'm sure it'll be great.