Ho Yay: When Goku is blinded by the Tiger King, Sanzo cures him by kissing his eyelids. And, in a later episode, when Goku sees Minmin (pretty much the only human woman he takes any serious romantic interest in throughout the entire series) for the first time, his very first thought is how much she looks like Sanzo.
In the third episode, Hakkai takes Goku's hand while they're asleep!
Tear Jerker: Ginkaku walking away in tears after her husband Kinkaku is trapped inside the magic melting gourd. Sanzo feels sorry for her.