As Sewin says "each to their own". We have Hills Alive (now Classic Travelling) fitted bags which we love because there's no wasted space, our seats do tilt forward which makes it much easier to get the bags in and out. For longer journeys we also have a leather suitcase (with waterproof cover) for the luggage rack (SWMBO does like to take the kitchen sink and several pairs of shoes per day!), not the Morgan one though. Personally I think that soft bags held on the luggage rack with bungy cords or the like don't suit the look of the car, but that's obviously just my opinion because I know that arrangement is very popular.
And to be more contentious.... I like a wicker picnic hamper strapped on the back
