To hate sitting in the same room as someone who is eating when you're not...

[Pattertwig]

the noises are GROSS

really turning my stomach...

munch, crunch, slurp, speak, swallow...

LOL, I hate listening to people eat cereal, makes me feel a bit green

Absolutely not BU.

I can't bear to be anywhere near someone chewing gum either.

It depends on the person. Most people don't bother me but my lodger makes the most horrible churning noises which turn my stomach.