Free global transfers is big if you have accounts around the world. HSBC's relationship manager in the US for our account there has been stellar, helping us move some money around now and then beyond that which is easily done online. They also helped us open an account in the UK despite being a non-resident, which is difficult to do on your own.
Did someone mention the chewy candies they have in the Premier waiting lounge? Not sure the regular account holders get those.