They do have a personality all of their own, don't they?! It's amazing how such small animals can have such big personalties!
It was quite funny, once my next door neighbour (about 8yrs) came over to see Cadbury, and she said "He's so big!" And then, when I took him out, and we sat down with him, he went and "inspected" her, climbing up into her lap, and sniffing and licking her all over, and then she said "He's so small!" I guess she just thought that he was big for a guinea pig (when actually he isn't), but he had a large personality for how small he was!