LadySuGa, Yedda was the first Q&A site I ever tried. Once I knew places like this existed I checked out a few others. Fluther.com and abovetopsecret.com ( or .net) were the ones I liked the most (Yedda is the only one I use, I like it best far and away of any others). answers.yahoo.com is okay (GRIS recommended it, but I like the serendipity/randomness of the way I can have Yedda present me questions). Those make the top three. I have tried wis.dm, answerbag, wikianswers, and several others. Some of these sites are very good in their own ways, and some are practically useless to me. What I get from using Yedda can't be matched. Some sites don't allow going off topic, which I think is too limiting. One thing leads to another, and communication for me is something that can grow in unexpected ways. If I made a chance remark about some interest, and the conversation starting going that way, it would be stopped rather than allowed to reach an unexpected educational opportunity.
Many of the sites I panned only allowed questions to be presented in topics. Yedda allows me to look at every question, regardless of topic, and that is a feature I refuse to be without. This is about my learning something new, just not teaching what I already know. I don't one day say, "humm, I think I will answer questions about songs today. Then maybe tomorrow I'll answer questions about mathematics."
Yedda also allows me to write any length of answer I want, and to include pictures, video and links. Many of the sites don't, but the better ones do.
I never understood voting on best answers. The person asking should decide that, if that is something they want to decide at all.
Yedda has had its problems with the posses, rules violations, rudeness and worse, but the staff pays attention to complaints (or else 
), and the site is an evolving thing. They are open to suggestions from the users and really try to make this a site everybody can enjoy, whether it is for learning, teaching, or socializing. It is a very creative place with a lot of intelligent people from all over the world, and tolerance for others' differences is expected.
Yedda wants to have a community, but it is not an exclusionary one. Most people try to be supportive, but of course, the more people you have in any group the more friction you will also have. Attacking others here is not welcome, but it happens. If it happens too much (and they don't take the hint from other posters), something will get done about that person. I wasn't at all interested in using this as a social site when I started using Yedda, but over time that part of it started to appeal to me, and I wouldn't like to give it up, now.
