Playing game characters sounds intriguing! Occaisonally I love to play games that are a bit "different", like Fetchquest/Monarchies of Mau (a post-whatever fantasy setting where you play dogs and cats) or the German "Plüsch, Power & Plunder" (=Plush, Power + Plunder, interesting how close these words are), where you play stuffed animals that suddenly come alive in the toy section of a department store. Games like these are great for a bit of change parallel to long running campaign with elaborate character developments etc.