What food can you simply not stand yet seems to be very popular and raved about by the masses? For me it would be olives, the taste sickens me but lots of other people eat them like they are nectar from the Gods. 
I eat and enjoy a lot of funky things, but I do not eat beets.
De gustibus non est disputandum.
I think sin would taste good… what does that say about me?
I can’t stand cantaloupe, cheeseburgers, or cucumbers. I seem to be in the vast minority with those.
I’ll be first. Cilantro!
Also, green peas, sweet potatoes, Brussels sprouts.
I hate every thing about cantaloupe.
The only thing I can’t stand is olives, but I do get why people like it. Everything else listed so far - beets, canteloupe, cheeseburgers, and cucumbers are easily in my top 10 favourites. ETA green peas, brussels sprouts and sweet potatoes also in my top 10.
What I eat that tends to be found gross by others are combinations - bacon and jam, peanut butter and salt & vinegar potato chips, cole slaw and rice.
Moved MPSIMS --> Cafe Society
Broccoli.
Coffee…I’d be hard pressed to choose between its smell, taste, and physiologic effect for what I hate most about it.
Sin tastes great, and I’ll bet I love 95% of the things mentioned in this thread.
Oddly enough, I hated olives’ guts up until just about a year ago. On a whim I bought some giant, blue cheese-stuffed monsters, and they were SOOOO good.
So, now I like olives. A lot.
mmm
Cilantro is delicious!
But I agree on cantaloupe. I dunno, it just makes me gag. I remember really liking it as a little kid, but something flipped when I turned 10 or so.
My own “gag!” is for “herbal” teas. Don’t get me wrong, I love tea, and drink it nearly daily. A few friends of mine (older) have fallen in love with the “herbal” teas - think “Celestial Seasonings” and beyond.
One friend raves about them. Convinced me to try one. I took one sip, couldn’t help myself, spit it out.
“Ugh! It tastes like the smell of a god-damned Yankee Candle!”
Said friend replied, “But it’s tea! You love tea!”
“Give me the package. I want to see the ingredients.”
…reads package…
“There’s no tea in this hot mess! It’s potpourri! Damn you, and fuck yo ‘tea’!”
This gets to me too. I don’t know why. The physiologic effect is probably the same as any caffeine drink. I say probably, because I cannot stomach enough coffee to tell.
Like you I love tea. (Including herbal tea, which is technically tisane not tea.) But I once made the mistake of trying lapsang souchong - it’s black tea that is smoked rather than air dried.
Horrible stuff. It tasted like somebody had made tea out of cigarette butts.
Cake.
Cheesecake. I don’t hate it, but it’ll be the last dessert I’ll pick.
Joe
Tea. Regular tea. So gross. Problematic when I lived in the South, where everyone automatically gets sweet iced tea, all the time.
Cilantro is horrifying, but I accept that it truly does not taste the same to other people. If it tastes to them the way they describe it, I can understand them liking it, and I don’t begrudge it. I just wish it wasn’t so lizard-raping trendy*. It’s become so ubiquitous that restaurants sometimes don’t bother to list it in descriptions, so I have no idea it will be in a dish until it arrives at the table. That pisses me off.
I truly don’t get the love for coffee or beer. Both smell and taste so awful to me that I don’t understand how anyone could develop a taste for them. Even the effects of the caffeine and alcohol don’t seem to explain it–you first have to drink enough of the stuff for it to affect you. Yuck.
*I blame California. 
I wanna try durian.
I like everything that’s been listed so far, and I can’t think of many single foods off the top of my head that I actively dislike. I guess white bread - the Wonderbread type stuff. I’m fine with hot dog and hamburger rolls, though their gourmet equivalents (brioche, poppyseed roll, etc) are vastly superior.