My boss and his wife were not that long ago, at our staff christmas party, complaining about each others taste in music (he likes, according to her 'head-banging sh*t' and she likes, he says, 'sloppy commercial cr*p').
I laughed at them but it got me thinking and BF and I ended up talking about it.
I asked him if he ever thought that, or would think that, about any of my tastes and he said that, considering we have almost identical taste in most things, he didn't think that would happen.
And it's true. Although we have our 'number one favourites' which may not be the same thing (band, movie, car, food) we do like the same things.
And I couldn't help thinking how different it would be if we didn't like the same things, and how many arguments we have saved (considering we've had about two arguments in the near-six years we've been together).

There are only a few things I can think of that BF likes that I don't ( GTA and other computer games that go no where, fried food, guns, lots of 'stuff') and things that I like that BF doesn't (sour food, high heels, trance), but in general we like very much the same things.

Of course this doesn't directly relate to finance, but in a way it does slightly. Personally I think having similar interests is cheaper. For example, BF and I take turns in buying CD's. Because we like the same music, we have a 'merged' music collection (with many doubles from before we were together). I can't help thinking that if we liked different music we would most likely have double the amount of music and separate CD collections. We are happy seeing movies we both like, which means we don't have to see a movie one of us doesn't like, which then means we don't have to take 'turns' choosing a movie.
Those are only a couple of things I can think of but there must be more. I remember reading a post from someone ages ago who said that they used to buy two types of peanut butter (crunchy and smooth).

I was wondering how many of you out there have the same tastes as your partners or have completely different tastes? what works? what doesn't? how do you compromise?

The only thing I got out of hearing my boss and his wife argue was that I think in the end it's important to respect other people's choices.

Live and let live.