It hurts when you let somebody down. Especially when they are close to you. I remember being brought home by a cop with my sister in the middle of the night, after being caught toilet papering. My parents told us they didn't know when they could trust us again. That was pretty harsh, it made me sick to my stomach. I guess they didn't expected us to sneak out at night, and they were disappointed. I think they lowered their expectations after that because the next time I was caught past curfew, they almost shrugged it off like I was doing exactly what they expected me to do. I was confused by this power play, and made sure never got caught past curfew again, I was much more careful.
I remember when I first started out in comedy, the self help books taught me to play with people's expectations. Great fits of laughter can come from pulling the rug out from under someone. Later on in comedy I learned to look out for those who have caught on to certain formulas. Some fans of comedy are like master bobsledders, they can see where the sharp turns are coming. So playing around with their expectations takes more work and adaptability. Sometimes you have to take risks that don't pay off. Even the best quarterbacks get sacked on an audible from time to time. When risks works out though, it can pay off huge, like when the Saints made that successful onside kick to start the second half of the Superbowl a few years back, they went on to win the championship, and look where they are today!
I guess what I'm trying to say is, you don't want people to know what to expect from you. One way to do this is to always be improving and developing in new ways at a pace that surprises them. I suggest taking up a secret hobby, and when your significant other corners you about sneaking out in the middle of the night, set the bar low by telling them your running with a wild crew. Wait a few months until they're crying home to their mother about how big of a looser you are shock them with a neat quilt or something, "Ta-da!"
Now here is a picture explaining how a CPU works.