Blogging is one of the most symbiotic relations there can be. Meaning that we all depend on each other. Why do people have blogs? It's a way for some to reach out to others, for some to share with others, for some to teach. In short we all want an audience.
This is one of the few times in life that people choose you on the basis of your inner self - not the way you look. It's nice to meet people and so liberating to let go and write without fear of censure or judgment.
Of course for it to succeed like any other symbiosis both parties have to benefit and that is where the amazing system of comments comes in. Anyone reading this will know - its quite an amazing feeling when someone takes the time and effort to leave behind what they think whether its a single line or a bigger explanation.
So much better than than just seeing an avatar in 'Recent Readers' widget.
It's the best way to introduce yourself - form a relation, a network that slowly expands and you build a group of people who become your familiars...and is it happens in a symbiotic relation its the best way for not only the person you left a comment for to reach your blog but also other people who have visited that blog. I know I check out a lot of blogs of the people who leave comments not only on my blog but other blogs...
A comment is a snapshot of you and your blog! And you never know who you will meet as a result of extending a small courtesy of taking your times and writing something and acknowledging another's existence.
It's just a nice thing to do - it makes me happy leaving comments, leaving traces of my presence in someone else's world!
Its just like saying hello when you meet someone for the first time or visit their house!!!