I haven't used the forum for a while so lot of the functionalities are new to me and I have to admit I found some of them really counter intuitive/annoying.
For a start, the way to reply to threads, that "Reply to this topic" button at the bottom that then turns into a small window which is incredibly annoying. Yes you can press esc and that turns into a full window but there you lose all the formatting options (code, quote etc): why can't we hav a normal full size window with all the options to reply to a thread as a default?
Then I tried to edit a post after I replied: I couldn't find an edit button to do so, that's extremely annoying and frustrating, where, if any, is the edit button?!
EDIT: about the edit button: I discovered that it's there, only it only appears at the bottom of the page so to see it you have to scroll all the way to the bottom first before thrying to edit something, still annoying, but less than what I first believed...
There might be more things, I will add when I discover them.