I used to fly Default aircraft all the time. Thats all I would fly. The 737, 747, and so on. There all "decent". When I first played FSX, I was kind of happy that most of the controls were kept simple, because I had no idea what I was doing really, with no aircraft experience. But once I got more advanced, learning how planes operate, and practicing my skills FSX, I moved on to the pay ware aircraft, like the PMDG, and Captainsim. Now you can actually see more physics involved in the plane, as well as reality. Like most of the button and controls in real life are toggable in the payware. And the default doesn't even have an FMS! That was a killer for me.
After using pay ware, I find it impossible to fly default 737, 747's
The smaller aircraft are fine as default with me though.
Do you ever fly default once you purchased pay ware aircraft?
I think they could have done a bit more effort in the detail of the planes.