We are among the ones who will allocate most of our travel expenses on F class air travel than say a 5* hotel, limousine, or fancy dining. So it is common to see us fly in F but only take the cheaper mode of transportation to/from the airport and/or stay in 3-4* hotels. Same pattern also applies to how my business travel (where the majority of my F class air travel take place) expenses are allocated. We also rarely spend money to buy expensive clothing nor do we frequently eat out at fancy expensive restaurants.