One factor we look at when partnering a channel is professionalism. In general, a professional streamer will have a positive attitude, treat their channel like a brand, and have a good understanding of what it takes to grow a business. Patience is important, and the ability to handle trolls without getting flustered is crucial. A professional streamer will have the same kind of “voice” across all platforms, and will most certainly stand out in a positive way.
For more information, see: How do I Become a Partner?