DS doesn't really have a clue about what he wants to do either. He has an extra-curricular interest in finance/investment but is doing a humanities degree so not sure how likely he would be to get a 'City' job. He's considering doing something post-graduate but think that's only worthwhile if it adds potentially to his employability rather than just being a way of putting off making a decision for another year!
Mind you, I do have a feeling that young people are not so quick to jump on the 'corporate bandwagon' these days as they would have been in years gone by (but maybe that's because many chose to go back home once they've graduated). One of my best friends' DD graduated from Bristol a couple of years ago and is still doing very studenty type fill-in jobs interspersed by global travelling (well as much as has been possible over the past 24 months).
DSib's eldest decided to change courses after a year (and start back as a fresher), so there's going to be at least a two year overlap at university for their two.