> Many are built with great design in mind.

I've gotta disagree simply because a lot of the people posting to ThemeForest are just trying to make a buck on their hobby - so many of those themes look exactly alike; they're not spending significant time thinking about the usability of their designs and just applying trends. TemplateMonster back-in-the-day was more reminiscent of designers with experience creating unique enough templates to be modified/used for multiple types of purposes.