I have had many different Hotmail accounts over the years and I also use Hotmail every day, along with GMail and Yahoo. I have many different email accounts that I use for different purposes. When I create a website or buy a domain name that I am going to develop, I try to get a matching email account at one of those 3. It basically depends on what is available where and if the name I want is at more than one of those, I just get all 3.
I also have email accounts with my hosting for email accounts that are used for website related contact and so on, but I use the others for random and misc. stuff.