Grapefruit infused gin is a favorite libation at my house. It only takes two ingredients and you can make it in 15 minutes. Preserve them while the fruit is sweet, flavorful and acidic, as citrus quality wanes over time.
Tamarind and orange make a great flavor combination and a delicious cocktail. If you have never worked with tamarind before, this is a great way to start. This is a delicious liqueur and infuses fairly fast.