I'm pretty sure that in the course of Dante's Inferno, we've come across that one enemy you like, and that one enemy you want to see dead the moment it spawns.
My favorite enemy is the Asterian Beast. Mounting these guys is much-needed payback at all the enemies that swarm me.
My most hated enemy is the Temptress, mostly because it's relatively fast, and I can't absolve/punish it.
Which are your favorite and hated enemies of the Inferno?