What are the Clockworks levels you most despise? The ones you're willing to sit around at the elevator for however long it takes for it to cycle on to something else, anything else.
Personally, after an insane Clockworks run last night it's probably Thunder Fist Arena. The unstoppable barrage of shock effects is pretty horrific, especially when it comes in the form of a dozen Gun Puppies and swarms of Volt Knights and Voltrodes. The fact that Shock interrupts weapon charging and shielding is particularly unkind. The devs have earned their mug of salty tears from me; we never stood a chance. D:
A close runner up is the Graveyard. Ugh, I hate Phantoms so much.
I actually really like the Graveyard.
I play it solo, so I only ever have to deal with one Phantom.
I hate anything with shock. And I do mean ANYTHING.