Pkrma, like you, I have quit alcohol cold turkey and also without the use of any defined program methodology. I am at 6 months sober. Most of the reasoning you specified in your decision to use no outside program mirrors my thinking. I have found that my thoughts about the effects of alcohol on my life and thought process are evolving as the length of time sober increases. I realize that lots of things about the way I perceived life were skewed by my immoderate and habitual use of alcohol. So I am finding that in my personal journey, reading and practicing mindfulness is very helpful in digging out of the old alcoholic debris. There is a journey here, one of self discovery, if you have spent most of your adult life drinking whenever emotionally charged issues surfaced. I totally agree it does not have to be done according to some existing dogma.
Best wishes to you.