Just a thought: if I'm at home, so my current context is Home, I'd like new tasks to default to context=Home, folder=Personal, due=Today, pri=Low; whereas if I'm at work, I'd like new tasks to default differently (context=Work, folder=None, due=Tomorrow,pri=Medium).
I think if this were done, entering a properly categorized task would be as simple as:
1. Click "Add Task"
2. Type task
3. Hit Add Task button (keyboard shortcut for this would be awesome!)
To do this, TD would have to elevate the context filter to a more global concept of "current context", moving the whole app toward being location-aware. The next step would be one-click context switch ("I'm home now").