The "I wouldn't like it" line always mystifies me. By definition, one must taste everything for the first time at some stage.
I always say, "I'll try anything twice, because I might have gotten a bad one the first time."
Here's an interesting spin:
Let's say I make the comment, "I hate Italian food! Oh, all those tomatoes and pasta and meatballs and pizza...it's just too much!"
Many people would come back with, "Italian cuisine is much more than just spaghetti and meatballs. Every region is different, lots of seafood, you can't just write it all off based on pasta and tomato sauce! How can you say you hate it, you've had 1% of that cuisine! You need to educate yourself and try a bigger variety of Italian dishes!"
Now consider the opposite. If I said, "I love Italian food! All that tomato sauce and pasta and meatballs and pizza...I could eat it every day!" - no one would come back and say, "Oh yeah, how do you know you love it?! It's a lot more than just spaghetti and meatballs. You need to eat a lot more variety, then you might find that you hate it!"
That never happens, but boy, say you don't like something, and people come out of the woodwork trying to convince you that they know your tastes better than you do.