Definitely exclamation mark.
, use it instead of . All the time
The brackets 
I like to use ; a lot to look intelligent
I use glasses for that
Sorry, I’ll type it in a bigger font next time
They’re all a bit shit really, aren’t they?
Is it the Percontation Point, for rhetorical questions
Big fan of how foreigns use «guillemots» as quotation marks.
guillemots as quotation marks you say? How curious
Big fan of the semi
Full stop. Classic, no frills, clear sense of purpose.