Fish/Seafood - the smell, raw or cooked, the taste, especially kippers, grey slimy almost translucent raw prawns (esp King Prawns), then they're all perky and pink when cooked, Prawn Marie Rose, boak, minging prawns swimming about & peering out at you from the bowl of pink soup and crunchy lettuce.
Dogs - slobbery, smelly, bum licking, jumping up, pawing, panting hounds of hell, people allowing dogs to lick their faces, boak, or letting them lick the dinner plates or the liquid out of cups, pass me a bucket!
Coffee, migraine inducing smell, especially stale coffee or coffee breath.
Celery - tastes of rank soap, and no, cutting it up and cooking it in soup/stews/any other dish DOES NOT MASK THE HONKING TASTE!!!
Other than that, not much really ......