I can use right-handed scissors if I have to but would prefer left-handed ones if I have a choice.
I am not ambidextrous at all. I am pretty much useless with my right hand. Some things I had no choice, every computer I grew up using was set with a mouse on my right-hand side so I still use that set up and it feels funny with the mouse on the left hand side at this point and obviously if I drive a stick, since I am an American, the shifter is on the Right-Side so that feels normal to me but outside of that, I write, shoot, throw, bat, golf, kick, left-handed. I think a lot of the ambidextrousness comes from left-handed kids whose parents pushed them a bit to right-handedness for certain activities on them but for whatever reason that never happened to me.