Why do we use the language we use?
I would say words, since as far as the entire language goes most of us only have one or a couple to choose from, except I mean the entire style of language we use.
Its really very interesting if you think about it. When you listen to your own words in different situations, or think about how your use of them changes over time.
In general I know I have a tendency to use rather precise language. If I know a word that has all the proper connotations I'm looking for I will use it. I wouldn't say I use flowery language though, I just end up using words that don't necessarily come up frequently in conversation. That's my baseline.