Making marketing decisions based purely on whether you’ll THINK it’ll work will only get you so far (for several reasons), but most of all, I think Avinash Kaushik sums this up best:

“You and I are poor proxies for the customer. And just because you don’t like something… how should I put it so you’ll understand…. oh let’s try this…. you not liking something is not a statistically significant sample of data!” - From this post.

If that’s not a good reason to start making more data driven decisions - I don’t know what is…