predictable poor behavior

Dont you just hate that some people are predictable?  Accountable, dependable are great qualities but predictable? i dont know.  I do like that with age the quality becomes less drama filled.  When one chooses to react vs respond based on emotion i find that quality to be unattractive.  I look at some people in my life and realize this is the very reason we are no long in each others life.  Either because of my predictability or eventually theirs.  Maybe it falls under that old definition of insanity?  Maybe it just falls into my dependable reason for happy hour and a sense of humor...