Tuna salad. My mom made it with celery and mayonnaise, and I used to love it; my favorite kind of sandwich from the time I was about six to maybe ten or twelve. Can’t eat it any more. It’s the mayonnaise, of which I have developed an extremely strong dislike in the many years since.
Oh wow. I can’t believe how many of those I read with eagerness! Thanks for the memories (NOT). 
Maybe because mayo manufacturers today use petroleum distillates instead of veg oil. 
NM
When did they change over? I used to work the line at the college dining hall, and it was well known that during lunch service someone other than me had to deal with putting out and cleaning up the mayonnaise, because there was a chance I’d barf if I had to handle it. For me, the switch came in 1972 or so, when mayonnaise went to being a fine ingredient in tuna salad, at least, to being the devil’s spawn. If that’s when the changeover from vegetable oil happened, well, maybe…
I was probably out of line saying “petroleum distillates,” but I do believe there are a LOT more preservatives in all foods than before and 1972 could be right close to when that started.
ETA: Have you noticed restaurants nowadays don’t keep mayonnaise even close to cool? Especially when it’s in “tartar sauce.” That bottle sits out on that table all day, occasionally getting stuffed with more tartar sauce, so the stuff on the bottom is becoming more rank as the day progresses. I think I need to hurl, excuse me… .
I mean, i guess it could be that. But a) there really aren’t any other foods I can think of that I used to like well enough and can’t stand now, and I’d think that at least some other foods underwent a similar progression; and b) there is no shortage of people out there who continue to like and even to love mayonnaise, as I am reminded every time some group I’m with gets footlong subs and all the pieces are slathered with the stuff. So I suspect it’s mainly a matter of changing tastes on my part. (It’s also possible that at some point I got very sick after eating something with mayonnaise, and though I don’t draw a conscious connection my stomach went into no-mayonnaise mode. You never know!)
It’s no secret the manufacturers have been cheaping out on the ingredients over the years, I’m certain that’s a big factor why so many of our earlier favorites are now disparaged here. I know junk food isn’t healthy, but if I’m going to sin I want to do it right. Sometimes tastes change, but that isn’t what’s going on. The “nudge” to healthy eating and/or less expensive ingredients has practically ruined many products.
As a child I could differentiate between ten thousand types of pure sucrose. I wouldn’t say I don’t like it now, but not in the pure form once enjoyed.
I felt the same way when I reread Dragons of Autumn Twilight as an adult.
I still watch the two-part episode “The First” every few years. But that’s about it.
Transformers The TV show was paper thin, stupid, and really just an ad for the toys. If you aren’t going to play with the toys you don’t need to see the adverts. See also He-Man, TMNT, G.I. Joe ETC.
The popularity of the films confound me, despite the nostalgia I myself acknowledge.
I too loved Cap’n Crunch even though it usually lacerated the roof of my mouth.
I read all of Piers Anthony’s stuff until I suddenly just started gagging at the thought of it.
It was fun cooking hot dogs on our hot dog electrocutor until I realized it was also a method of execution.
I still watch Lost in Space. on cable on Saturday nights if I can stay awake. It is so low-rent and stupid, I just have to watch, but to be honest, I watch for the Robot and Dr. Smith Show within the show. ‘Never fear, Smith is here…eeeek!’ ‘Danger, danger, Will Robinson!’ ‘You nattering nabob! You babbling booby!’ I recently saw the episode with the green alien woman who thought Dr. Smith was ‘pretty’, and even first time around when I was 12 years old, I thought ‘lady, you are barking up the wrong tree~!’ 
Campbell’s Chicken Noodle soup smells like sweat. I’d have to heat up a can a week for my husband who had a list of about a dozen foods he would eat. (Chicken Rice soup wasn’t quite as bad and I sometimes made won ton soup using it as a base.)
I’m mystified when grown adults in their 40s start losing their shit in anger because someone’s gonna remake Silverhawks as an anime or put She-Ra in sweatpants or something. All those shows were garbage! The only reason they seemed cool was because you were nine years old and had two UHF channels to choose from for after-school cartoons.
I’ve heard people defend Real Ghostbusters and I have good memories of it but, honestly, I’m afraid to ever re-watch an episode and find out.
Even us culinary cro-magnon types have noticed canned food quality (always about on par with boiled scheisse) has declined. Beef stew used to contain chunks of stew meat, right? Well it was discovered that a meat “glue” could be used to form all those floor sweepings into chunks. Hormel “New and Improved!” their Chili in 1997, I remember this because even by then I’d learned to beware such pronouncements on any advertising.
Chicken in a Bisquit crackers used to be these wonderful greasy salty confections. I bought a box for nostalgia sake - just an imitation. They are “baked” now - always the death-knell for any self-respecting junk food snack.
Oh I agree. A proper crispy snack is fried. Although I have found that popcorn can be microwaved in a paper bag. I do it that way now, and not on a stovetop, not for health reasons but because leaving out the initial fat to pop the corn allows me to have more corn to make up the calories. Of course I do butter it.
Yeah, Campbell’s Chicken Rice was marginally better, and I used to occasionally jazz it up with more rice and leftover chicken and extra vegetables back in my college and early bachelor days. But Campbell’s Chicken Noodle, with that dishwater flavor and those slimy noodles…yeccchhh.
'Did you know this was a RPG campaign that Margaret Weis and Tracy Hickman were in!"
Yeah, it reads like it. Next time they should write a good story with actual character arcs, plot and world progression. Loved the series as a kid though.
I’m surprised nobody has yet mentioned Twinkies. When I was a kid I could buy a 2 pack for 12¢ each at our corner grocery. Loved 'em. Mom used to pack 'em in my school lunch. For grins I recently bought a pack at the local C-store. I could only manage to eat half of one, threw the rest away. Maybe they changed the recipe or maybe they were just that vile all along.