Phil,
Of course you can construct an opinion. It is just LHR to CDG is a very short high density air route. It is never going to be the last word in luxury or gracious living. Check in is standing in a queue to deposit your bags, answer a few questions and pick up a boarding pass. Boarding the plane is sitting in a holding area, then standing in another queue that slopes down a metal tunnel, enter a plane, slowly proceed down aisle to your seat. Level of comfort is a seat in economy class for around an hour. It is not a long time so you won't get too uncomfortable. The cabin crew will be polite but busy. Very few of them in number will try and serve a drink and a boxed snack of some description ( its a sandwich ) to many people, in a time frame of little more than 30 minutes if they are lucky.
Easy jet and other LCC's do offer an inflight service. You can buy stuff from a trolley. BA give you a sandwich and a drink. Most people on short distance transport only care that the flight gets them there efficiently and on time. If you are hoping for some sort of ethereal experience on such a flight you are probably going to be disappointed. Beyond this there is not really much anybody can add, is there ?