Another leftie here.
I do most things with my left - I even sleep on my left side.
The scissors thing - always used right handed ones, with my left hand of course. Must have gotten so used to it that now I can't stand using left handed ones. I can never get them to cut correctly. It does give me an excuse for not cutting straight. I used that all the time in school.
My DH learned very early when we were dating to sit me on the outside after I knocked the food off his fork with my elbow at dinner one night. Usually end up rearranging the place setting at a restaurant as everything is usually set to the right side.
I don't curl my hand for writing and hold my pen normal but I still get ink on the side of my hand. Ugh! Can't use roller ball ink pens.
My computer mouse is on my right side and of course driving the gear shift is on the right side, not much choice in that one. Was told that left handed people should be able to learn to drive a standard vehicle easier than a right handed person because you use your left foot for the clutch pedal.
Ever notice when a someone hands you a pen to sign something they will hold it out towards your right hand?