I'm left-handed for writing, eating, and using the mouse (except in games). I'm right handed with sports and other things and the like. I use spiral bound notebooks upside down and backwards. I left click with my middle finger and right click with my index.
I can't stand sitting to the right of right-handed people. Desks in high school were somewhat uncomfortable to use because they were ergonomically right handed (I think that's how I conditioned myself to write with my hand at the top of the paper and write downwards). We only had one or two left-handed desks and the teachers would put those in the back of the room, so it was either not see anything, or be uncomfortable.
Normal scissors hurt my hands, but it's always a good excuse to get out of cutting handouts and the like for people.
It always annoyed me how teachers in architecture school never knew how to teach the left-handed people.
I
HATE right-handed people! They make me so
ANGRY!
Spoiler For the sensitive who can't get a joke: I'm kidding.
EDIT: And I can probably never buy a somewhat cheap gaming mouse.