Ask What factors to consider when choosing a membership site theme?

[SuperAffiliateX]

I need to pick a theme for my membership site, but I have no idea what to look for. I want it to look good and be easy to use. It should also work well on mobile and load fast. I'm not sure if I need special features or if any theme will work. Do some themes make it easier to manage members or add content? I don't want to choose the wrong one and regret it later. What factors should I consider when choosing a membership site theme?