General asshats
Circle I: The "Being Repeatedly Nutted 'Round The Head" Room

Asshats who try too hard to be funny
Circle II: The "Being Repeatedly Nutted 'Round The Head With A Used Tampon While I Laugh At You & Ask You If It's Funny" Room

High-horsed "moral" celebrities, Parents who bring squalling brats to movies
Circle III: The "Being Forced To Watch Les Misérables (the movie, not the stage show) With Your Darling Kiddiwinks Without Any Loo Breaks" Room

Militant Vegans
Circle IV: The "Eat A Fucking Burger Already" Room

Big Brother contestants
Circle V: The "Just Fucking Listen To Yourself" Room

River Styx

Creationists
Circle VI: The "Crushed Under A 12-Ton Fossil" Room

River Phlegyas

Annoyingly defensive minority groups, Smug, condescending religious people
Circle VII: The "Talk Diarrhoea To Eachother Until At Least One Of You Dies" Room (but because it's Hell, they keep coming back to life and regenerating over and over! :D)

Psychopathic ex-girlfriends
Circle VIII: The "Shut The Fuck Up, I'm Prettier" Room

Robo-Hitler
Circle IX: How the hell would you punish Robo-Hitler? He'd probably enjoy it.

Design your own hell...