Shopping:
Having Chassidim, Litvaks, and Sefardim in one class, one beis hamedrash, etc. is actually quite an advantage. That happens to have been my experience, and we are all richer for it. It’s been many years, and many of us are still connected. But there was a factor involved that should be the envy of all. Our Roshei Yeshiva treated each and every talmid as an only child, establishing a bond that continues into the present. There was an open approach where every talmid brought their mesorah from home, and the respect given to it was noteworthy. When each talmid was connected at the top, the achdus was established, and the differences accomplished proving color to the fabric of the yeshiva. The opposite situation, when the achdus is permitted to develop without the common connection, carries a risk. These various heritages become flash points for competition and friction.
The yeshiva’s role is to provide the chinuch, not the minhagim. Values come from הורים and מורים. One should follow the minhagim of their family, and be the link in continuity. I have direct guidance on this from both Chassidishe and Litvishe that directed or modeled the following of family minhagim as essential to one’s obligation in developing their personal derech of Avodas Hashem.