To be fair, it wasn't my wife's idea, this was all her sister, but my missus obviously went along with it all and didn't say anything.
I sent loads of songs over to her of my favourite bands and songs and she never, ever said she didn't like any of it.
She came over and I took her to see Grandaddy and Polyphonic Spree and the Flaming Lips and again just never said anything. It was only after we got married that I found she didn't like anything I liked.
Even her sister didn't actually mean any harm in it, she just thought all would be okay because we are both nice people and it would all work out just fine. But for me, there always needed to be some common ground and shared interests. That was a key foundation for my part.