i would suggest to cut down on the amount of ppts and just put the pictures or the containing stuff just in the mail.
it saves the time for download and people will be more willing to see it.
if there is a chance of sending lovely stuffs without ppt then why not???
i have had several feedbacks from my friends saying that they don't like to download the ppt and see it.
they would rather prefer it in the mail itself.
though i would not discard the option of ppts. please send when it is absolutely necessary!!!!!!!!!!!
and at the end of each ppt there seems to be a slide with the picture of a girl which isn't necessary!!!!!
otherwise it is fine and i am glad to receive mails.