I do taste some bitterness in brassicas, but not to the extent that a lot of people describe. And as a recovering bulimic, I do have a history of overeating. I'm less able to eat spicy food than many people I know, but that may be to do with having a low pain threshold in general. My pain tolerance is generally pretty high, but there's a strong psychological element to that, and I guess most food just isn't worth tolerating pain for, to me.