Following the 4 years reflection (actually 3-1/4) thread made me ponder this. What thing about Skyrim has bothered you most from release date to now?
For me it's about the way the dialog choice selector doesn't work properly. There's the dialog choices. I want to choose choice #3. I put the cursor on it and click -- and the program concludes that I chose choice #1. So I figured out that you can't rely just on cursor placement. You must ALSO make sure your choice is highlighted. (Hard to tell sometimes if that choice is already grayed out.) Even then, sometimes I have my preference highlighted and the cursor on it, and I still get the wrong choice selected. [A real bummer when the choice the AI selected is counter-productive. Like "Serena, I need to trade some things with you" becomes "Serena, I need you to treat some arrows with your blood" or "I want you to turn me into a vampire".
Three years of feedback, and I know players have complained about this bug many, many, many, MANY times.