I want to start blogging. Which site should I use?

If you're blogging more for yourself and aren't really interested in having a following, I would go blogger or blo. But, if you're looking for a following and social interaction, I would go with tumblr. Tumblr, if you're serious, also has many different options-- such as making you a dotcom and corporate layouts. On tumblr, however, you will have to work to gain a following and sometimes people don't really post what is true to them because they care too much about it. Also, tumblr is the most simple.