Analysis Paralysis
You can be thorough, methodical, systematic – whichever word you choose – but if you overdo it, it may hurt you. Of course, you need to be disciplined to obtain the necessary information to make a decision, but often the incremental time analyzing isn’t going to give you that much more information.
+ Through over-analysis, you may miss the point, as aptly described by the cliché of not seeing the forest through the trees.