I get my fair share of LinkedIn requests. I happen to find the product extremely valuable and have a paid version. Lots of time, you get the odd one where somebody just uses the templated "I want to add you" stuff. If I don't the person, buh bye.
So along comes Marc who takes the time to be straight up:
"I'd like to add you to my professional network on LinkedIn.We don't know one another but I'm a Toronto guy, doing my MBA in Boston right now and trying to get into startups in TO. Read your blog and know your network will be very useful as I find places to land. Thanks!"