I am two months post-RNY.
To echo what other people have said, the surgery did not change my love of cooking. It probably increased my love of cooking for others. I am married with four kids and my in-laws often join us for dinner. I focus on cooking foods for them that I can handle eating in small portions. I am looking forward to cooking Thanksgiving next month, even though I will only be eating a small plate of it. And I still experiment with recipes and foods that I have not cooked before (been learning how to cook seafood better since my stomach handles it well and it is high protein, low calorie).
You will still get a lot of joy from a perfectly executed recipe, you just won't eat as much of it.