I don't pay too much attention to the sun sign by itself, but the moon sign, or a combination sun-moon description, works better. Or at least I can make it fit me better as a Virgo-Scorpio and INTP.
The combination of your Sun sign and your Moon sign produces one that looks and acts like an intellectual, but with an emotional nature that is truly the driving force. This is perhaps the most emotional of the quiet Virgo breed. The quick mind and common sense that is so notable in all with Virgo Sun, is charged with an intense rashness and impulsiveness common to Scorpio. Your ability to reason and rationalize is well developed, but you often seem almost incapable of believing what is foreign to your internal emotional bias. Thus, you become very partisan in whatever causes or ideas light you fire. These you may rationalize and try to give intellectual status, but you usually color judgments with intuition rather than logic. You are facile at thinking up reasons why your ideas are right and always persuasive at putting them across. At times you appear near genius, and at other times, way off base. You are often to be found among the theoretical and radical thinkers, able to prove nearly anything on paper with diagrams to show how it should work. Whether it really will or not in real life may be another thing. Your intellectual powers are strong, but you're often less than realistic. You have a certain zeal that makes it hard for you to remain still and listen to what others have to say, and you can be dominating in your approach to group endeavors. Underneath, you have a somewhat brooding personality that is forever probing, turning over stones and delving for ideas with which you can either feel affinity or enmity. In business you are likely to be successful and valuable to your employer because you do possess powerful leadership qualities. In this environment you seem to become more objective and less emotional. Nonetheless, learning to restrain the natural tendencies of this configuration will make life and relationships much easier."
© Michael McClain 1996-2008. Permission is granted for unlimited noncommercial use. All other rights reserved.
That sounds like me.
(The copyright is 4 years out of date so did I really need to post the copyright from the page?)