For me, it just depends on my mood and where I am. When Eileen rides with me, it is always fairly laid back. She doesn't like high speeds except, strangely enough, she likes me to ride fairly aggressively in the twisties as long as I don't drag anything.
When I ride alone, I tend to ride faster a bit more often but there are still times when I like to just take my time and enjoy the scenery and serinity.