I have a lot of time invested in creating Wordpress templates. I want to release combinations of these templates along with different styles and Fancy Front pages as Premium Wordpress Themes. What I need to know is what does Premium mean? What do people expect of a GPL theme vs. a Premium theme? Are there features that are considered required to be premium? Are there features that are in demand but considered exceptional i.e. not part of every premium theme? How can I tell the difference?I have heard tounge-in-cheek answers that say that any theme that makes money is premium, but I mean to ask about what gives an outstanding theme it's quality. Why is it worth more? I am technically able to do many things, but as a lone developer with a family to feed, I can't afford to spend time on features that no one cares about. I have to try to isolate the things that people want. This is serious food and rent to me.How can I get this kind of info so I can make my project successful?
By what features and qualities are free and premium  themes differentiated
web development;project management
Build a website (if you havent already), put your themes up there and make them available for download. IF you want to give some away, call those Free, and the ones you want to sell call them Premium, and charge money for them. You will probably also want to offer an Exclusive license which will make that person the owner of that theme, which would mean they pay a lot more, and you remove it from your site.Premium implies that it is custom, professional (in the sense that it stands up to other commercial designs), and it's created with the intent that it be great. Sloppy work is generally not accepted as premium work.. although the creator of sloppy work can call it premium. It would just not be as premium as other premium, more refined work.There are also a lot of sites out there where you can upload your theme to which will pay you when someone pays a fee to downloads them.. In that case you'd be listed in their premium section.I hope you like this premium answer