As much as I am against people making choices on league tables, they did help my make an initial shortlist - of say 20 universities, which I then looked at in more detail in their prospectuses and whatever.
There were a few I was still undecided about, and so in the league tables I did look at things such as student satisfaction, student breakdown (i.e. apparent average UCAS achieved) and graduate prospects (I didn't really pay any attention to RAE and research quality ratings and staff and all the rest of that), but I would say at least 75% of the determining factor of my choices was down to my personal judgement/feelings/experiences about the universities, especially after visiting them.