I was thinking the same thing 2TP. Dependable means doing what you say you will do, being responsible, and following through. Predictable is something else entirely.
I consider myself highly dependable. Yet, the night before Thanksgiving I went out with friends... highly unpredictable, especially if you know me. But I knew that my son would be up around 6 or 6:30 on Thanksgiving morning and I had to be home and in some shape to be with him. I chose to come home around 1am, though I had in my mind that I may stay out later if I ended up sleeping somewhere as long as I was home so W could go to work. That's the dependable part.
Conversely my W is predictable right now but not highly dependable. If there's a chance to go out she will. But she may call in sick to work, may not be home, may get the kids to school late, etc...
They are not the same thing.
Married 6 together 8 Me:38 W:31 second marriage for both SS12, SD10, S6 Bomb: 9/8/11 (day before our 5 yr ann) W moved out: 2/18/12 D final: 11/12/12 Share S 50/50. Spend as much time as I can with SS & SD