I have an … unconscious preference for removing rough/uneven parts of my nails as soon as possible …

This preference is not unconscious. You are aware of it, otherwise you could not have written about it. Maybe you meant to say that you sometimes enact this preference automatically/uncritically/mindlessly? (I think those three words basically all have the same meaning.)

I have an … inexplicit/unconscious preference for removing rough/uneven parts of my nails as soon as possible …

This preference is neither inexplicit nor unconscious, at least at this point. You have made it explicit, and you are aware of it, otherwise you could not have written about it. Maybe you meant to say that you sometimes enact this preference automatically/uncritically/mindlessly? (I think those three words basically all have the same meaning.)