Which Niche Q&A Platforms & Communities Do You Like?

Greetings Everyone! Quick Intro: I've been managing a forum community for the past ten years and based on that experience, I'm now developing a new and potentially much larger niche community concept based on Q&A. It seems most popular Q&A websites these days lack a genuine community vibe...I believe Q&A can also be fun and approachable (unlike Quora which makes me feel like I'm taking a test). In terms of platforms, I'm liking Question2Answer (free, open source, simple, functional, customizable). In terms of niche websites, wetawa.com has a friendly feel and look that I like (although the name is questionable). I'm searching for examples like the ones I mentioned above to help further develop my concept. I'm also wondering if it's better to start building a Q&A platform from scratch or to use an open source example like Question2Answer to build upon initially. Mind you, I'm not a Developer but I wish to be familiar with the technical requirements involved. Speaking of Developers, I have a Technical Partner but I am also seeking to network with Developers who have a real passion for creating community-based websites. Thanks in advance for your time and I look forward to any feedback! Sincerely, Antoine