How do you react to food/drink you don't like?

Inspired by this question, I was wondering how do you react to food that you don’t like?

Eg – I drink my tea very weak, with just a touch of milk. It does indeed look like dishwater. Particularly in the UK, people here mostly drink tea quite strong with a decent serving of milk, so my preference is unusual. I am regularly told “That looks disgusting!” Of course, what they really mean is that it’s not how they would like to drink it.

If I am somewhere where I can’t be so particular, I ask for a weak coffee and drink whatever I’m given.

There are only two foods that I absolutely cannot eat, namely liver and kidney (the texture causes an uncontrollable gagging reflex). With any other food, if I’m served it, I will eat it. (I have never been served liver or kidney – they’re just not that popular, thank goodness, so I have never had to politely decline food.)

If a friend is eating something that I don’t like, or don’t like the look of, I try not to say “Eurgh, that’s horrible”, although I must admit it’s sometimes the first thing that comes to mind.

So, it’s a two part question really:
1 – do you always eat what’s served to you by friends/family regardless of whether you like it?
2 – how do you react to seeing someone eating/drinking something that you find repulsive?