We've all been spoiled by years of cardboard pizza delivered straight to our door. Valentino's makes you work for it. The Little Italy pizzeria is a favorite of the brainiacs at Case Western Reserve, and for good reason: The alchemists at Valentino's work absolute magic with their ingredients. At times -- usually after our third or fourth visit in a given week -- we've wondered if they're slipping heroin into the sauce. How else to account for its addictive properties?