Yeah, that would be me. Spending more time on planning the fix than doing.
And it doesn't, as you've noted, bring about appreciably better results. I sometimes do wing it with VERY little preparation (often the result of procrastination), but if I get an early start I worry every detail to death. Waiting till the last minute brings its own stress, but sometimes it feels better than doing the endless PROCESSING.
What we are talking about right now is the primary thing I would like to change in my life. So far I haven't had a lot of success with it.