Descriptions:
#24:

does not contain black as a "main colour". The others are black or at least partly black. (Yes,

also contains black, but it is for the 3D effect, not its real colour)
#25:

is part of a family; the other items are 1-item-families.
#22: I'd say

because it is worth less than 10k points (I think this answer has not been correct anywhere yet; and it has never been as well usable as in this case because in the other cases the five "good" items were too different from each other; now they are very similar)
#23:

because it has been talked about in the forum recently
