There was an interesting post recently from a PPL who took his first trip to a reasonably busy UK airport. He planned it carefully, phoned up for an arrival time, agreed to pay the various charges asked of him, and was given a 'slot'. The GA pilot appeared to arrive in good time, was told to hold by ATC, then vectored to final approach and cleared to land. At less than 2 mile final he was sent around because a commercial jet who was number two to land was coming up behind.
This pilot though ATC were great, so I sort of questioned him, but he still thought ATC were great so I thought he had a good time so why introduce doubts. Me, I'd have been cursing them as I followed all their instruction to the letter, had agreed to pay the money requested by them for their professional services, and yet at a very late stage had been assigned a lower priority than a commercial jet behind me (and which didn't have right of way in the technical sense). Instead of being gushing with praise for ATC, I'd have wanted to send them an invoice for the extra cost I was paying on the Hobbs.