Just joking, those activities actually seem very well rounded, and generally part of a classic education. However, if you look at it, there is no big adrenaline kicks in any of them... So IF you are actually tired of it, why don't you do something with an element of danger in it (horse riding seems like the most "dangerous" thing on that list).
Throwing yourself out of a plane,as an example, is bound to take some time before it gets boring.
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