Nice thread guys, very useful indeed.
Most of the stuff you have listed is already being addressed, I'll try to go through each one from the OP just go give you a clearer picture. Please note these will all be resolved as soon as possible, the development of this site and the forums are a high priority for us right now so we don't want to leave anything half done

- The quote problem
It's being worked on and shall be changed soon.
- Read topics displayed as unread
It's being worked on and shall be changed soon.
- Page count for large topics broken
This is a new bug for us (nice find) and we'll get it fixed.
Suggested improvements:
- Time zones
Definitely something we can add, however surely the point of the post times is to show the gap between each post, if we have a universal board time that would work just as well? Or are you planning to use this time as a clock also?
- Signatures and avatars
Something we're looking into, we want to add more customization but we're just deciding on the best way to do it, we have a few different ideas and you'll see some changes on this soon.
- Emotions
Smileys would be great to have, there were some design conflictions with the default ones so they need to be changed slightly, we'll try to get these added in soon so people can truly express themselves!
- Gaming Platforms
We'd like to add more customizable profile pages for everyone. Another avenue we are exploring.
- Quick reply
Agreed, a quick reply is awesome, this is likely a feature we'll implement in the near future but i don't guarentee it

I'll keep an eye on this thread for any additional feedback and update when we can cross more off the list. Thanks again for taking the time to share this with us!
Tom