They taste bland.

它们没什么味道。

Do you have a preference in food?

你的饮食有什么偏好吗？

have a preference in...

在...方面有偏好

I really go for shellfish.

我真的喜欢贝类。

go for...相当于like,表示“喜欢”

Conversation:

A: Would you like to come over for dinner tonight?

你今晚过来吃晚饭吗？

B: Yes, I'd like to.

好的，我很乐意。

A: Would you prefer meat or fish?

你喜欢肉还是鱼？

Would you prefer A or B?表示“你更喜欢A还是B”?

B: Sorry, neither. I have to tell you that I've become a vegetarian. I don't eat any kind of meat or fish.

对不起，都不喜欢。我得告诉你，我已经是个素食者了，我不吃任何肉类食品。

A: Oh, what a pity. How about beef? You can't beat beef.

哦，真遗憾。牛肉怎么样？没有什么比牛肉更好吃的了。

B: No. I have no taste for beef.

不，我不喜欢吃牛肉。

have no taste for...“不喜欢吃...”

A: Then shellfish? I really go for shellfish, because they are nutritious and they provide me with the energy.

那么贝类呢？我很喜欢贝类，因为它们有营养，并且能给我提供能量。

B: No, thank you. I said I don't eat any kind of fish.

不，谢谢。我说了我不吃任何肉类。