I put Shamu Miracles, because it is my favorite Shamu show and I LOVE the sax player at the beginning, the music, concept, everything. But I also always sit in the splash zone front and center, which makes it even better. But it was a hard choice because I really like all the Christmas events. I have not been to Uni, so I will have to go there this year and see what they have to offer. Been meaning to go for years, but timing was never there.
Sea World in my opinion does Christmas best because they have the most overlays and the most free new offerings within one park. We go 2 to 3 times in a season to be able to see everything. Osborne Lights and Candlelight Processional are right behind though. I have been to the Candlelight Processional sometimes twice a year and I just started going about 6 years ago. The first time was Edward James Olmos and I was just blown away. I have also seen Gary Senese, Neil Patrick Harris, and Blair Underwood. I know I have seen others, but they were not as memorable. I have seen church productions and they just don't even come close to what Epcot does.
Maybe when I see Uni stuff this year my rankings will change, but it seems to be mixed reviews where some say the best and others say it is cheap lol