I went to shachou's livejournal and did the personality test she and sho lover did. The result is:

Spontaneous Idealist (SI)
Spontaneous Idealists are creative, lively and open-minded persons. They are humorous and dispose of a contagious zest for life. Their enthusiasm and sparkling energy inspires others and sweeps them along. They enjoy being together with other people and often have an uncanny intuition for their motivations and potential. Spontaneous Idealists are masters of communication and very amusing and gifted entertainers. Fun and variety are guaranteed when they are around. However, they are sometimes somewhat too impulsive in dealing with others and can hurt people without really meaning to do so, due to their direct and sometimes critical nature.

This personality type is a keen and alert observer; they miss nothing which is going on around them. In extreme cases, they tend to be oversensitive and exaggeratedly alert and are inwardly always ready to jump. Life for them is an exciting drama full of emotionality. However, they quickly become bored when things repeat themselves and too much detailed work and care is required. Their creativity, their imaginativeness and their originality become most noticeable when developing new projects and ideas - they then leave the meticulous implementation of the whole to others. On the whole, Spontaneous Idealists attach great value to their inner and outward independence and do not like accepting a subordinate role. They therefore have problems with hierarchies and authorities.

If you have a Spontaneous Idealist as your friend, you will never be bored; with them, you can enjoy life to the full and celebrate the best parties. At the same time, they are warm, sensitive, attentive and always willing to help. If Spontaneous Idealists have just fallen in love, the sky is full of violins and their new partners are showered with attention and affection. This type then bubbles over with charm, tenderness and imagination. But, unfortunately, it soon becomes boring for them once the novelty has worn off. Boring everyday life in a partnership is not for them so that many Spontaneous Idealists slip from one affair into another. However, should the partner manage to keep their curiosity alive and not let routine and familiarity gain the upper hand, Spontaneous Idealists can be inspiring and loving partners.

Adjectives which describe your type
spontaneous, enthusiastic, idealistic, extroverted, theoretical, emotional, relaxed, friendly, optimistic, charming, helpful, independent, individualistic, creative, dynamic, lively, humorous, full of zest for life, imaginative, changeable, adaptable, loyal, sensitive, inspiring, sociable, communicative, erratic, curious, open, vulnerable

These subjects could interest you
literature, art, music, parties, concerts, travel, dancing, eating out, joint pleasure

While doing the test, i got stuck at the "thinker or feeler?" question, thus, i went back to do it again and i'm kind of stuck in between Spontaneous Idealist (SI) and Groundbreaking Thinker (GT).

Jiken kenka(rida style): i'm really mixed-up ne..