Quite frankly I'm looking at any character that is fairly well known, visually interesting, enjoyable to sculpt, and doesn't present any obvious copyright/trademark problems. I hope to set up a survey on my site (jaredzichek.com) this evening and get a more scientific view of collectors' preferences. I would like the series to feature a mix of super hero, sci-fi, and horror characters, but that might turn off folks who only like one type of genre. There is also the key question of white metal vs. resin - I prefer the former, but it is more expensive primarily due to the lead content, which increases weight and shipping costs.