Most of my punctuation usage over the years has been instinctual, so I can't even say that I am doing it properly ..?
Left parenthesis space words space right parenthesis = ( words )
No spaces (words) is just too claustrophobic to me. Right and wrong, left and right, and hamsters are not all vermin.
< second comma necessary before the final "and" Mice, rats and hamsters are all vermin.
< no second comma before the "and".
In essence, never go 2 "and"'s without a comma for seperation so groupings stay properly grouped. He left the room ... slowly ... staggering ... as he walked.
Ellipsis follows or precedes space. He left the room...slowly...staggering...as he walked.
Too claustrophopic for me without the spaces.
As a personal preference only ... 3 dot ellipsis as pause mid statement and 5 dot ellipsis for statements trailing off into .....
And if you are ending a statement with ellipsis and punctuation, add it to the ellipsis like so ...? or ...?!