I have tried both of these fruits recently and I'm still trying to decide if/how I like them. They are not sour or bad. There flavors are unique, but not strong. I think I'll have to try them again.
I'm finding many tastes are acquired and getting to know a flavor can be helpful. I did find that bananas in the States are bland and flavorless. I've never had a mango that tastes as good as the ones here.
Sometimes you have to decide to like something.