Hmm...
Mac - We're both shy and caring and go high on sugar (though not THAT high).
Bloo - We both have extreme and often crazy ideas, can't paddle ball, get over-the-top excited a lot and can be quite sarcastic.
Wilt - We both end up doing things for other people and are considered very reliable. And we apologise way too much.
Coco - We both like to be quite random at times.
Eduardo - We both like cute things, soft toys (or 'beanie baggies') and can be quite protective if we need to.
Frankie - We're both caring people, but can get pretty cranky sometimes.
Mr. Herriman - We both like to feel useful and although I'm not as strict as him, I do find myself opposed to most deviant behaviour (depending on a number of different factors, I do study ethics after all^^

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Madame Foster - Errrm... I guess you could say I was eccentric too.^^
Cheese - We both like chocolate milk... and cereal!
Goo - We both have wildly active imaginations and are considered weird to most other people. I also didn't really have many friends (well... one true friend actually) until recently in my life.