To me, freedom is the ability to choose my own timetable; to choose in which direction I can travel, and what level of quality to aim for. Freedom does not mean being completely unburdened (as you cannot go very far when you choose to do nothing). It is the freedom to choose which burden to carry - rather than accepting the one forced upon you.
We are all constrained to one degree or another. I'd rather choose my own constraints than to wear shackles chosen by others.
What does freedom mean to you?