The human bran is attracted to contingencies, the mixture of regular and random things. Contingencies are concerned with the border between the self and non-self. Things about the self are in general predictable, whereas actions and events arising from the non-self are largely unpredictable.
There is, however, an important amendment due to the above statement. The dynamics of the unconscious contain surprises and inconsistencies from the point of view of the conscious mind, as historically demonstrated by Sigmund Freud. One cannot control one's dreams or hidden and often suppressed desires. Thus, due to the existence of those irregular elements, the core of the self is rich in contingencies.
That is why one keeps being attracted to the self. If everything about the self is predictable, it is not very fun any more. The very fact that some part of the "I" is unpredictable makes being the contingent self so interesting.