Why do you use the sites that you do? Today there is so much choice available to you for any conceivable need, that you will inevitably become very picky about the services, and sites that you frequent. As you should be.
Consider the actual things that go into forming that opinion of yours.
These are the qualities that most good websites possess. A single missing piece might mean that the site will fail at some level. Consider allstepisodes.com. I bet you’ve never heard of it right? I bet if I told that it hosted, for free, every Star Trek episode EVAR, you might just call me a liar. Well doubt not because it’s all true. Yet this site fails (for now) to be “findable”, and so it is worthless to most of the hairy slightly smelly cos-play Star Trek fans out there. And you should never piss off a Treky.