Broccoli! I liked it a lot before pregnancy. Now, it needs to be au gratin or something, hidden by fat and cheese, lol, or I just really don't like it. I serve it and eat it b/c I want my kids to, but I'm not feeling the love while I'm doing it.
Crawfish: I wouldn't say I have an aversion to it. But I used to cook it once a week. Then I was seriously, seriously sick during my first pregnancy and I'd buy my husband some boiled crawfish because I couldn't stand to cook it, then I'd leave it in the kitchen and run close the hall door, the bedroom door, light candles, and "hide" in my room until he'd eaten it, cleaned up the mess and taken the trash outside, and turned the dishwasher ON. He'd also light a citrus candle to take away lingering smell. Now....we eat it a couple times a year. I love it, but it's just never been "the same". :P
And I do that gag thing you mentioned. That's strange. My husband just shakes his head, lol.