Heartbroken Badass: He claims that he's lost everyone he's ever loved. We don't know what happened to his wife, but we do know that his half-grasshopper son jumped too high one day and was killed by a helicopter.
Only Sane Man: Only when compared to Garth and Dean, of course, but Rivers seems to be the only person involved in the production that realized that it was awful, but is too polite to mention it.
Really Gets Around: Implied in the last episode when it's stated that the broccoli infection is sexually transmittable. Also an Informed Attribute as Sanchez is never seen with any other woman apart from the broccoli infection victim and is constantly being shot down by Liz.
Dumb Blonde: Despite the fact she "aced every semester and got an A", she almost always acts as The Load.
Easily Forgiven: After she rampages with her Psychic Powers around the hospital and is given a lobotomy to remove her telekinetic abilities, the rest of the staff make light of the fact that she killed the temp.
The Sociopath: Learner in real life is strongly implied to be a serial killer.
Soul Brotha: Thornton Reed is probably intended by Marenghi to be played as a Soul Brotha; he says in the first episode that if Dagless doesn't pull through, "My ass is grass! And he (Won Ton)'s got a lawn mower, ya dig?". Dean Learner cannot quite pull this off.