One of my favourites has to be the Hunter. Taking my aunties dog for its walk on the fields at Mad Nook and watching them taxi out of the Squires Gate factory (and watching the rabbits run alongside, the dog was more interested in the rabbits).
Then there's the EE Lightning, I was doing a job at a farm at Freckleton quite near to Warton and saw what was possibly one of the very last UK Lightning flights - mostly straight up and down, but the driver was really giving it plenty and a bit for luck.
Just because I saw a lot of them, through living near Blackpool airport, there are the Dragon Rapides, and the Bristol Freighters. On their way in from the Isle of Man, they used to chug over our house, you heard them coming from miles away, and next door's cross bred Alsatian/Labrador used to lie in wait, then chase them down his garden, barking furiously, invariably ending the chase with a huge crunch into the back gate. I dread to think what it would have done had it caught one.