I've been told I have very strange diction and little hand mannerisms when I talk.

I'm not sure how odd it is in the rest of the world, but I've lived in Canada all my life and never once met someone else who points only with their middle finger.

Whenever I'm waiting or am bored, I do that weird thing with the fingers like so.

Oh, and I tend to start laughing in public when I remember something funny and laugh harder when I try to not laugh. Very weird looks it gives me.

This might be related to the first thing, but apparently I speak in anachronisms (the term used was "old timey words").

(This also might be part of the first thing,) I have this weird thing where I can never use a contraction where saying the words in the order given in the contraction would be weird grammar. (ex, someone ask me to do something, instead of saying "can't you do it?", I'll say "can you not do it?".