What separates premium themes from regular ones? Advanced features? Graphics? Support?
Why do some people pay top dollar for premium themes when there's a wide assortment of free themes available. I've checked out a few of the paid themes, and while they do look nice, I've seen professional-looking themes that don't cost a thing.
Don't get me wrong, I know there's plenty of poorly developed, bland looking cheap themes out there too, but there are good ones freely available as well.
The reason I ask is that I've recently been working on a few themes of my own (far from finished of course, but I do have the general theme idea started).
I'd like to incorporate advanced features and such into my themes, to set them apart from the regular themes, but I can't decide on what I'd like to include.
What's lacking in current WP themes that could eventually be implemented? Anything you'd like to see that doesn't quite exist in WP yet?