Yes the DC-10's were 'different' and they are missed, even if the odd MD-11F does fly over from time to time. I remember seeing one of the THY DC-10's doing and emergency return to LHR a few days after one of their's crashed in the forest outside Paris in 1974 (I think ?), the crew had an issue with a cargo door or some such, which was a contributing factor to the Paris crash. I remember also waiting until it was dark to glimpse an Air Zaire DC-10 landing for the first time at LHR, such was it's rarity back then ;-) The colour-scheme of National always used to make me smile, even on grey winter days when spotting at the Queens Building :-)