Next station: Courtesy Card... Qualification criteria are not published but it could get you Suite Upgrades for free on short stays...
Diamond status comes with the 'formal' status (guarantee of breakfast, internet, best room, bonus points) and you have to build up your 'internal' status with the hotels as well: the more often you stay at a property the better your treatment gets. Five years into Diamond I have some hotels I frequent often and the treatment there is excellent and leaves nothing to be desired. Hyatt is very good at loyalty management and I like the fact that they are very reliable here.