The practice of trying new things is not so much designed to find thrill and elation in each new thing itself (however, sometimes we get lucky and stumble on somthing awesome), but it is more of a mental adjustment, a consciousness shift, that, over time, can help wake up the mind, get us seeing differently, which can contribute to relearning how to enjoy life once again. Of course, buying a new kind of toothpaste will not make us happy and thrilled, but each time we "try something new" we build patterns of thought more aligned with interest, and curiosity, important emotions when we are looking to rebulid our mental outlook on life after years of abuse.
"The mind is everything"
-Bruce Lee