I am completely 100% left handed. I even use the computer mouse with my left hand and
do 90% of my typing with my left only.
Oh yeah and I really hated those right handed desks in high school, too. And also, whenever the teacher would be showing us how to do something the right handed way and instead of showing the left handed person how to do it, they would just say "do it backwards" um, hello, that doesn't help!
At a dinner when people were close together, it was always my fault if my elbow hit the person next to me. Because of this, I was always given a seat on the end of the table. Even to this day I automatically go to one of those seats.
Me too on both those statements.

Most of left handed people I know have alright, but not great handwritting, me included.

Oh, and I hate it when people tell me I'm wrong handed.