I find that it's best to look back at what I wrote, before sending.
I think that starting too many paragraphs with the word "I" leaves a very subtle bad impression.
I will review and edit the wording to remove as many leading "I" as possible, preferably all of them.
I think that the resultant messages are much improved.
I know that some may not have noticed this, but I have.
I hope that you find this advice useful.