In ArcGIS 9.x the "create profile graph" and "interpolate line" tool worked decently together. I could happily trudge along making profiles and graphs over an area I am interested in.
In ArcGIS 10, this tool is broken. Everytime (almost) I create a graph, the tool defaults back to point profile, adding an extra step for me.
And if you ever do fix this, adding keyboard shortcuts would be nice too.
