Camping: Start in the woods with a tent already placed and perhaps a fire already going if possible.
Flight Survivor: Start at a crash site, perhaps with some minor injuries.
Lost in the Dark: Spawn in a random sewer/subway tile with a dead flashlight. (Probably hard thanks to Chuds)
Coma Survivor: Wake up in a hospital with nothing but a hospital gown and whatever spawned nearby. (I imagine this would be rather difficult)
Police Suspect: Start in an unlocked jailcell with a single zombie cop on the other side of the door.
Prisoner: Similar to above but start in a prison, much harder.
Lab Rat: Start in a room in a lab with zombie scientists outside.
As you can tell I kinda favour the harder starting scenarios.