I love crab rangoon as well, and you're right, different restaurants I've been too that offer some type of rangoon is different in their own way . . . the only ones I don't particular care for is Panda Express, because, well, there's nothing in theirs but just cream cheese. Red Lobster recently introduced crab and shrimp rangoon that's pretty good.
When it comes to Chinese, once again, their various different chickens win out with me: teriyaki chicken, General Tso's chicken, crispy chicken, mushroom chicken, sweet-and-sour chicken, etc. However, one of our local Chinese restaurants has a baked shrimp that is definitely my favorite item . . . I won't lie, if I happen to be alone at the buffet, I will load up on them, because they always go quickly, so you have to grab them while you can.
But that does bring something to mind, however . . . a lot of buffer chains are still allowing customers and patrons to serve themselves, so long as they wear fresh gloves, and face coverings . . . but this particular Chinese buffet? Nothing doing. They actually have an employee get your food for you, which, admittedly, is kind of tedious, since that means literally only one person can be served at a time.