Regarding vacation or trips in general for me it still feels going by fast and less special as I get older. I recon it has to do with that in the past vacations and trips would be planned for me (by my parents) so everything was a surprise and a discovery. Nowadays I have to plan everything for my family, so I do a lot of research regarding where to go, what to do, what will be most fun. So there is less of a surprise for me in case things do go as planned (like an attraction being closed or not as fun as it would seem). But this also means there is less room for me to be surprised and discover.