Writing well can be a curse

Lately I have been sending out a lot of e-mails to my far-flung friends, recommending cool sites that I've found on the internet. I've done so many of these that I am afraid that they may be ignored. Why? Pardon me for tooting my own horn, but I've become so practiced at writing these that I'm beginning to sound like a form letter. Many sites give you the option to enter your friend's e-mail address and the site will send a standard "come try this" letter with your name on it. My e-mails are starting to sound like that. I find myself trying to find personal comments to add to the e-mail so my friends will know that they haven't been spammed :-).