The dealer I use has VW, Audi and Seat franchises on one site so I’ve had a variety of courtesy cars in the past, such as base model Polos, Golfs, Audi TT’s and various SUV’s and a mix of manuals and autos. I personally don’t mind what I get - my current car is a DSG but I find it’s quite nice to get back in a manual if only for a day.
I try and arrange my car service to coincide with doing a clear out of my garage and shed - I find a courtesy car is great for doing a run to the local tip!