I saw a recipe on.Bon Appetit for an orange juice and coffee drink, my initial impression was "no way" but I modified it a little and really liked it.
Cold brew, fresh squeezed orange juice, and Topo Chico fizzy water, poured over ice.
I also like the salad that is fennel, oranges and olives and onions, and also the Mexican fruit salad that's pineapple, mango, jicama, onion, with citrus juice dressing and cotija sharp crumbled cheese.
I think that's it for combinations that sound awful to me but taste good to me.
I like Campari in orange juice quite a lot, and love it in grapefruit based cocktails. Siesta with 2x the Campari is actually so good after the first sip to calibrate. In coffee though? Seems like it would amplify the unpleasant flavors in both.