I hardly see anyone selling keychains/cell phone charms anymore in the artist alley. Bookmarks are cool too. I can never get enough of those.
my tastes vary on the art style but some of my favorites include:
I recently got into K-ON though and I LOVE THAT TOO!
Good luck in sales though. I'll see you around. And will stop by to see what you decided on doing.
Planned New Cosplay for near future (in order of listed):
Monica (Dark Cloud 2) 5% done
Eclair (Dog Days) 0% done
Nai (Karneval) 0% done