I am in the frequent situation of forgetting to select the surface toggle in the extrude (or revolve) command before entering sketcher. This usually requirems me to close my sketch with a couple of lines in order to exit sketch without losing my sketch, toggle from "solid" to "surface", then go back into the sketcher and delete the extra line segments.
I know I can do it with a map key, but I was hoping there is some parameter somewhere that I can change to switch the default to surface. IMO, thats the way it should be because any sketch can be switched to solid after the fact, whereas the opposite is not true. Comments?