Undead for me. I can probably chalk this up to my earliest MMORPGs, Ultima Online and EverQuest. Both had really solid undead mobs. Ultima Online had an entire dungeon – Deceit – devoted to skellies and liches and spectral horrors and mummies, many layers down into the depths, and I have spent a not inconsiderable amount of my life fighting them. And EverQuest? Listen, the laughter of EQ’s skeletons is still the sound I hear in my brain when I think of video game skeletons, followed by the satisfying rattling-bone-crunch when you defeated them. But still, I’d pretty much always prefer to fight these guys than anything else.
Let me put it to you: If you could fight only one mob type forever in MMOs, what would it be? What’s your favorite mob type in MMOs?