All of them.
If anything, Poison would be the one that is less annoying to me, at least with that you only lose HP. Burn you lose HP and Physical Moves' damage ends up being halved. Frozen and Sleep make you unable to do much until you hopefully get out of it the next turn. Paralysis reduces Speed, and you have a chance of not being able to do anything. Confusion makes you hurt yourself sometimes. And Attraction makes you unable to do anything at all other then drool over your opponent, and all you do is question their taste.
I don't want to lose HP, but I'd take that over being unable to do anything, or hope for luck to kick in, or have my attacks weaker or Speed lower. Ultimately, I'm annoyed whenever anything is done to me, but I enjoy it nonetheless, plus I do the same thing anyways so the NPC shall feel my pain even though they can't.
But yah, pretty much a whatever way tie between everything besides Poison.
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