Just a minor thing, but many of the forums I use have a button to go to "Advanced Reply" that keeps any text you've typed into the "Quick Reply" box.
Scenario: I start to write a thread reply in the 'quick reply' box. I then realize that one Orkmoticon I never use would be perfect here. I have to copy my text, hit "Post Reply," then paste my text and keep going.
Proposal: I start to write a thread reply in the 'quick reply' box. I then hit the "Post Reply" button and the text I already had carries over to the 'advanced reply' box.
There's been one or two times that I've lost big posts because I'm used to other forums

My 2 cents.