No, you're getting it wrong. This is not a personal preference but a use of the tools available here at Wikipedia. I'm not disobeying the WP:NPOV policy, since I'm being neutral in relation to both systems. By adding the color green to a positive answer (a "yes" for example) or red to a negative answer (a "no" for example), like its default use, I'm not stating that a system is better than another in a certain aspect, I'm simply using the tools available without breaking any Wikipedia rules/policies.