DS is waiting for his A level results. He had identical offers from 3 UK universities: 2 of them in the top 10 and one a middling university, which rates highly for student satisfaction for the course he applied for. All to do the same course. One of them is also our home city. He chose our home city as his first choice. He said he liked the course best and it would be 'easier'.
Whilst taking his exams, he seemed unsure about whether to go to uni at all, or go travelling, get a job etc. We reassured him that he could make his own choice, but to concentrate on getting the best results he could, so as to keep his options open. He's going travelling for the summer (partly funded by us), and wanted to wait until he was back to decide. Absolutely fine.
Today he announces that he's going to change his first choice to the middling university. Only justification - he's going to have to move away sometime and it might as well be now.
What do we do know? Just say that's great and leave him to it, or try to influence him to make what we think is a wiser choice, e.g. go to a 'better' university. I wanted him to consider living away from home initially, but he didn't seem keen so based our own life plans on him wanting to live here for the next 3 years.