I've always written a note either on a blank card or stationary, tailored to the job. I haven't ever seen a card with a pre-written message, like a birthday card for example. I'm assuming you mean a note written on a card, vs. the pre-written type. I would think a pre-written type would be odd, but not a negative if that makes sense.
When interviewing, a thank you card is a plus. Not writing on isn't a deal breaker, but a strike against the candidate. Misspellings or poor grammar is a bigger strike than not sending one, since in my mind, if you don't care about the impression you leave before you are hired, how sloppy will you be afterwards?