Higher or lower expectations?

Few years ago at college, I remember I had several fields I didn’t like it at all, but I needed to get them done. My strategy with those ones was easy, I would invest as less time as possible to get the minimum required, so I could use my time in other fields, the ones that I really liked.
My expectations with the results of the ones I didn’t like were low. With 5 points out of 10 (that’s the minimum required in Spain) I would be quite happy. I didn’t expect more, I just wanted to get a 5 and keep moving.
When I passed the exams of those fields with more than 5 points, I was really happy, because I was expecting less. However, in the fields I expected a higher result, let’s say 9 points, and in the end I had less than that, around 7, I would be disappointed.
The thing here is, what you expect has a huge impact in the way you see yourself. In the way you keep moving forward.
It would be stupid to expect always too less, because in the end you’d be right. As well as expecting too much, because you’d end up frustrated.
I want to make this point clear: It’s good to increase your expectations. It means you’re making your own path. But, don’t get frustrated with it.
Seth Godin wrote about this in his book The Icarus Deception: How High Will You Fly? The story is about the Icarus’ story. If the bird fly too low it’ll crash with the water, but flying too high is dangerous as well because it can get burnt with the sun. The good path is to find something in between.
The best choice is to find your own balance. Make expectations based on your effort, being as realistic as possible.