Interesting that your experience says Bosnia is the most yugonostalgic. The most batshit crazy Greater Serbia talk I hear, even to the point where Yugoslavia is viewed as an anti-Serb mistake, is always among older men in villages in the Republika Srpska. They outdo their peers over in Serbia, and they might even be ahead of their coethnics in northern Kosovo. In the Federation, Muslims often express happiness at being independent, they just wish their independent state didn’t have such a dysfunctional system. I have seldom interacted with Croatians in the Federation, though.

My own experience has found that ethnic Macedonians are the most yugonostalgic, which might be understandable since 1) they had linguistic autonomy outside the acrimonious quarrel over "Serbo-Croatian", and 2) they avoided the wars. But all this is anecdotal and I can see how others might have very divergent experiences.