unless you're the kinda of person who's brain associates taste or smell with other senses, for example tasting colours might seem all dandy, until you find a colour that tastes like poo. I've also heard of a guy who got the taste of earwax whenever he heard a certain name. I think it was Trevor.
Yes, nice synesthesia is a nice thing to have. I've read about similiar cases - I think one was having the word 'Prison' taste like rotting meat or such, or to someone who couldn't watch the news because the negative imagery created all manner of unbearable sensory overloads to the other senses.