| is shift \ on my keyboard, but the key shows a broken line.

# means pound as in weight in US as well as number, also called a hash mark.

! bang and * splat make me smile. Much easier than exclamation and asterisk.

I also like the computer geekdom calls . dot instead of period or full stop. Dot com, etc.

If . means full stop, what's a not full stop?

.. looks like a typo. ~ for an indefinite feeling works better for me.