What Monsters do you really hate?

Thanks Seeker.

Honestly, I don't hate any of the monsters in (A)D&D. They are all God's children, and I preach Universal Love towards all monsters.

Hug a monster,
Prespos

PS.
Seek, I think you forgot to add the Throat Leech to your list!

I think Kobolds, Goblins, Orcs, Hobgoblins, Knolls, Bugbears, etc. are all overrated!

Ooooh!!! Big, ugly, barbaric buggy-men! Run for your lives!

The Goblins, Orcs and Hobgoblins in the MMI reads the same: savages who
attacks everyone, including each other; averstion to sunlight to the point of blindness; they eat/rape/enslave people (in any older); a percentile range of weapon-use (that somehow forgets armor); tribal communities with cool-ass names; tribes with command groups, riding beasts and/or support
brutes. The funny thing is, one could easily replace them with human bandits, savages, unruly soldiers, etc., and nothing is lost by that!

The difference between them are slight. They differ only in slight stats builds, and some cosmetic differences that means nothing to me. Do I make the Orcs Tolkienesque pigsface types, the WoW/WHFB-styled greenskins with massive under-bites, do I make them like the naked, one-eyed wigglers form the UK Basic rulebook, or do I make-up my own details? Do I make the Bugbears the scarecrows form the OD&D books, the bandy-legged Wookies from the MMI book, like the Darkstalkers form the FF, or do I make-up my own details?

For me, I would rather have them as an open-ended class of monster rolled-up like Demons from Appendix D, from the old DMG, as I could could have a wide assortment of "Goblinoid" monsters to keep the players on their toes.

I've faced down all 4 of those monsters, just in the past year!

Green Slime in Ath's game.
Disenchanter and Rust Monster in Chris's game.
Crypt Thing in Thork's game.

From a player/character point of view, yes, those monsters can be nasty.

From a DM point of view, I'm not too fond of the Disenchanter or Level-draining Undead (assuming one plays level drain BtB).
These are monsters that should be used sparingly, if at all.

Prespos

PS.
A good fix for level drain can be found in REF5 Lords of Darkness. Take the list and make it into a d10 table of effects (maybe with 10 as "no effect"). Roll twice if the creature drains 2 levels. Using this rule seems to make level-draining undead a lot more fun to encounter. You never know what's going to happen!

I use the alternative rules in Lords of Darkness as well.

HATE - TELEPORT - AND - LEVEL DRAIN.

On a slightly related side note - some of the mini-adventures/lairs in LoD are great stuff to run.