Complete Noob here...never even played a MMORP

How about PC monsters?  The above example about spawning creatures (spiders, rats, , etc.) gave me the idea that it might be interesting to play one of them (albeit one of a little more intelligence).

You could grow larger  and acquire skills that would let you organize and control smaller creatures of the same species and develop special attacks(poison,etc.) and defense (heat vision...)  lot\'s of possibilities.

Your job?  acquiring food (other PC\'s ) for your spawn, luring adventurers into traps,...

Of course the roleplaying would be essential, but it would make a trip to the local spawning ground a little different.