I love so many Dim Sum dishes, and my preference can change daily.
However, I would say the two Dim Sum I appreciate the most on a regular basis are:
Siu Mai; 燒賣 (aka Pork Dumpling)
Char Siu Bao; 叉燒包 (aka BBQ Steam Buns)
Char Siu Bao definitely grow on me in the last decade, especially now that I have learned to make them at home. I really appreciate it. However, I have loved Siu Mai as long as I remember. I remember that I always requested it as a little kid when I went to eat Dim Sum with my parents. My mom always told me that Hao Gar (Shrmp Dumplings) are better and that I don't know what is good. :P
In summary, I have to give it to Siu Mai. It is my most favorite. If nothing else, at least I have a long history with it. :)
How about you? What is your most favorite Dim Sum dish? It does not have to be Cantonese Dim Sum. Thanks.