Even the original Super Mario Douchebags can be awesome with great gameplay. This and most other maps on here are sweet and your playthrough makes it badass! I'll be watching these mods/maps for years. Now go FIST, that Mancubus.
That was an actually decent slaughter map. Lots of room to maneuver; different enemy types to increase infighting... a lot of these SMs are just so _boring_ in how “sloggy” they get. The only thing that makes them entertaining (for me) is maneuvering around the attacks, getting massive amounts of monsters to attack each other and enjoy the carnage.