Many of us have been at someone's house eating dinner and we don't really like the food that is being served. So how can we say that we don't like something politely?

Here are a few ways:

I am not really a big <something> fan.
Thanks but I don't usually like <something>.
No thank you. I usually don't eat <something>.
So many people like <something>. It's strange but I don't really care for it.
I appreciate your effort but I'm going to pass this time.