I don’t really care about most of these issues, although I do think there should be a “house style” that has rules for them, because consistency makes things easier to read.
But I do care about how wide the source code gets 
I have middle-aged eyes, so I use a larger font than a lot of people seem to prefer, and I want to be able to have two editor windows open side by side with different pieces of code in them. This only works if comments are kept to the same overall width as the code. It is better if everything is no more than 80 columns wide. 100 is acceptable. 120 is too wide.
(It’d be okay to make an exception for extremely arcane stuff, like assembly language and TECO macros, where you may want to put a comment on every single line.)
(Middle-aged eyes also appreciate a wider space after sentence-ending punctuation, but I think that’s something the computer ought to do for me automatically, not something I ought to have to type.)