As I commented on your main question, I'll get one of the StackExchange team to remove your LEGO Answers account.
LEGO Answers is a member of the Stack Exchange network, where users can ask and answer questions on various topics. As you've noticed, we're not discussion sites, instead focusing on questions that have clear, quality answers.
I imagine that you'd like your other network accounts left alone (as you have some Reputation over on Ask Ubuntu).
Hopefully you'll come back to us when you have a question we can help you with.
In terms of discussion forums, you could start on the official LEGO Site:
- Create and Share - has galleries and message boards for you to share your MOCs.
- Creator - has regular building competitions.