Last KCon, I did fairly better with keychains versus prints. I think I sold maybe 4 prints tops. I was sharing my space with a friend of mine who's a more established artist online, so next to her, I looked like a hack. -_-; But also the stuff I put out there was from series that I liked. I also found that as good as the product is, it's not always going to sell. Most of my stuff was King of Fighters, Vampire Savior (Darkstalkers). My keychains this year were Ouendan, Phoenix Wright, and Roxas and Sora from KH. My friend sold keychains of Org 13 and made bank. ^ ^;
I'm going ahead again with keychains because I found people go for them more as they aren't a burden to carry around and they tend to be cheaper than prints. I'll probably do half-sized prints too.
I'm sticking to my guns though about drawing from series that I know and love, so Biohazard/Resident Evil, xxxHolic/Tsubasa, Phoenix Wright, Deathnote, and maybe I'll do a Rozen Maiden set.