All the personality type descriptions on this site are entirely composed of personality items each type self rated highest on compared to the average.    To clarify further, one of the descriptions on the RLUEI page is "not usually happy".  The source of the description is the personality item "I am unhappy".  645 test takers that scored as RLUEI had a self rating average of 2.34 (on a 0-4 likert scale) on that item.   The average of all test takers was 1.32, so RLUEIs scored significantly higher on that item.

In fact that item had one of the highest type vs. average differences (D-score), hence it's inclusion at the beginning of the description.   (The order of descriptions is entirely determined by D-scores.)    This can mean that an item with a seemingly average score of 2.0 for example could show up first, if the D-score is sufficiently high.   On the personality item "I don't like happy people" RLUEIs self rate as 1.51.  That number could be described as low, but the average score on that item is .7, much lower, resulting in a D-score of .81.  So despite a seemingly low score, that is a very meaningful  RLUEI item.

The highest scoring item for RLUEIs is "I love music".  The average score is 3.58 on that item.  That undoubtably is very high.   It's not included in the RLUEI description though.  The reason is every one else apparently also likes music.  The average score overall on that item is 3.62, so the RLUEI D-score of that item is very low.   Liking music is just not very descriptive of the unique personality of RLUEIs.

I've added a note on the description pages to hopefully minimize confusion and I'll try to make sure when transcribing description items that they reflect both the D-score and the raw score (i.e. that when an item has a large D-score but a low raw score that is conveyed).    Based on the D-score, RLUEIs are not huge fans of happy people, but as the raw score reflects, they don't, on average, dislike happy people.

Self ratings are not everything though.  I plan to add supplementary descriptions in the future composed of peer ratings (aka friend ratings). Beyond that personality descriptions are never going to be one hundred percent accurate for each person.   Not everyone reads items to mean the same thing and not everyone is honest (consciously or unconsciously) about who they are.  Also, the more you score between types the less accuracy you are going to find in the Jung and SLOAN descriptions.

Relevant Links:

Personality Type Descriptions