There is a particular bottled salsa on every table in Costa Rica. It's called Lizano and the first time you taste it you have to stop and think a minute. Do I like it or not? Sure, it tastes like a mass-produced bottled sauce but somehow it's also really pleasant in a sweet, smoky, tangy way — like A1 meets tamarind paste — and then you're addicted and you look at the label, and if you understand Spanish, as I do, you find that it's loaded with fun stuff like like sodium benzoate and MSG.
You're already hooked, so you continue eating it on your vacation knowing that soon you'll be home and can swear off the stuff, conveniently no longer within arms' reach of a bottle. You eat it because it's perpetually in front of you and is a perfect match for the day-in-day-out Gallo Pinto, literally "spotted rooster" or rice and beans in Costa Rica.
You hate Lizano and love it all at once, and when you get back home you can think of little else.