DH and I have the same taste in food; it didn't used to be this way. DH ate more junk food. We never cook fried foods and if we were doing things like hollandaise, crepes, and bechamel, we'd be huge! Those are very special occasion foods for us.
The biggest difference between DH and I is that he has to follow a recipe exactly! He's improved a very teeny bit on this, but it really stresses him out if we are missing an ingredient because he doesn't think in terms of how he could substitute. We sit down before grocery shopping and pick 3-5 main dishes/sides from our collection of cookbooks and recipes I've taken from Cooking Light. Planning what we are going to eat helps us maintain our weight. We also have a good deal of "staple" things in the house and probably could have a week's worth of dinners that would be fine, but simple.
When I went back to school, DH started cooking 1-2 nights a week, because then and now, I get home much later than I did when I was teaching, like between 5:30 and 7:30. I leave the recipe for him and he's on his own. Mostly, I've been the cook, and now it's a little more even. But, there are things that he's always done, like Thanksgiving turkey. I don't even know how to do that.