Hello Johan,
Welcome to the forum. Well, that is a huge dilemma in algorithmic trading. You will not find a precise answer to this question.
The best thing would be to try it both. You can open one Demo account and leave it trading all the time, and one another where you can pause. See which one will be better for you.
Personally, I do not pause anymore. The EAs are generated and backtested over the complete Historical data which means without pausing. And the other thing is that we aim at fully algorithmic trading.
So it is up to you.