Hi Tim,
I love Plan-G and use it on every flight. I have gotten to know the program quite well. There are very few things that need tweaking in my opinion as it does exactly what I need it to do.
One thing I would like to see is some of the options work better, specifically the AI Aircraft controls. Plan-G does not listen to my commands. I tell it to turn off AI altogether and it takes two or three tries to get AI to go away. I have TCAS on my planes so I don't need to see them on Plan-G and want to turn them off. 
I honestly have nothing else to complain about. That one issue is so miniscule that I am embarassed to mention it. Please, keep up the good work and keep it free if possible.
Thanks!

I don't have a clear idea of what you are after by doing this, but armchair pilots have Plan-G and http://skyvector.com/. That's all I need, personally. With my laptop next to me, I'm set.