I would have the Sprite,
from the Sprite adverts.
I don't know if you got that in the US, but he was lovely.
He would come into work with me, and I would occupy him with activities like counting and sorting my paperclips to keep him out of trouble.
Then he would ride in my bag while we went out for the evening. If he occasionally popped out and came back with spare coins and notes it wouldn't be my fault... You can't help these klepto sprites...
Also, he would get on very well with Diz, and play with him when I was too tired. They would scramble about the flat and wear eachother out, then curl up with him in his heated bed, creeping in with me in the early hours (like Diz).
Oh, and he'd eat raw mince and liver. Which would make his breath smell, but you can't have everything.