Well, this is the feedback section, so here's my feedback.
I wanted to ask a question on Stack Overflow, so I went through the whole registration process, and eventually got the answer I was looking for.
I hit a few bumps that negatively impacted my user experience.
Password complexity. I'm using a Stack Exchange account, so I understand that's not directly related to this site, but it was what I used. I shouldn't need a complex password to ask a question.
Answering my own question. I got the answer I was looking for about three hours after I posted the question. When I went to answer my own question for the benefit of everyone else, I was told I would have to wait a few hours because I was a new user and wasn't allowed. I found that to be silly and not worth my time.
All of the popup help along the way was very annoying, especially when it caused the content of the page to move around. I would prefer the option to ask for help rather than having it shoved in my face.
Clicking twice to log out? Bad usability.
Asking if I'm human when I'm logged in? Really? Aren't we past that once I'm registered and all that?
That was my user experience. Now you have your feedback. Hope it helps in some way.