Raw tomatoes - slimy, seedy, weird skin to choke on, etc. and don't care for the taste. I'm fine with tomato paste (though can't eat too much of it or I'll get acid reflux) - and smooth non-chunky spaghetti sauces and Mexican sauces (mild).
Peppers (see my "Bell Pepper Rant" thread
)
Onions that are detectable - texture problem - green onions are okay.
Vegetables cooked till they lose their fresh green color and crispiness, and become soggy brownish blobs.
I've noticed several on this forum don't care for lettuce and find that interesting because as a picky eater in general, iceberg lettuce was my first voluntary "green" vegetable! But I think I understand - it's similar to the way I feel about onions. Nowadays re iceberg lettuce, I find it
too bland and prefer Romaine, Green Leaf, or a mild baby mix. And I like raw spinach.