I know what you mean, I have been on the aircraft a few times this year and I am booked for October as well with Flybe. I would love a -Q400 but it is unlikely because Gatwick flights are with the 146. Though if the price is right then I don’t really mind which aircraft I travel.
As Ren Frew said though, savour it while you can because I imagine they will be leaving in the next couple of years for shiny new Boeing, Airbus or Embraer aircraft.