Why the word Huge and not Big?

I chose my blog title because I imagine every ones life as a tiny little dot on a map. Like those maps of the world that glows brightest with tiny white dots illustrating population density. If you took just one of the dots in New York and divided it a thousand times and then took one of those dots and did the same...well, there you have your small little dot. Even Oprah is one of those dots. I feel that all of us are capable of doing something big in our lives, ok maybe not Oprha big, but still big...it doesn't have to be publicly known but it can still effect the well being of our world. If I think of the most inspirational people and what they have done and then think of them as a little dot, it seems possible that my little dot of a life may be able to do something inspirational too.
As for the word Huge...my son uses it but he pronounces it Hooj. I take much delight in watching his little lips get perfectly round when he is describing the Hooj full moon or a Hooj truck. How could I not use the work huge. Now the word big just seems so blase.