I've had tamago gohan a few times before and I really wonder why some people loves it so much... It's just a raw egg mixed with rice and soy sauce, often with sesame seeds as well. While it's not disgusting and tastes alright, it's truly not that tasty and nothing I would eat on a regular basis even if I live in a country with eggs similar to japan's that can be eaten raw without risk of salmonella. I mean, geez, aren't there tastier things? You know something that's way tastier and really easy to do? Just scramble the eggs quickly over high heat in a frying pan and add them to the rice while still quite soft, you can also add soy sauce like with tamago gohan, or use the ingredients for tamagoyaki to make some scrambled eggs instead of the normal tamagoyaki layering and mix with rice. While it's not as fast as with just a raw egg, it's still something that'll only take a minute or two to do and it's way tastier.
Maybe it's an acquired taste. Well, what isn't? Even japanese rice was something that I wasn't that fond of from the beginning, but after trying several different kinds and experimenting with preparation methods I found myself craving for japanese rice quite often, even loving to eat it without anything else, even the sorts I didn't like much before. Well, nothing beats koshihikari rice for general purposes. Stuff like yumenishiki rice and garbage from other parts of the world than japan is just way worse than real japanese rice, with some exceptions.
I still can't handle seaweed well(except for stuff you make dashi with) and I have a strong aversion to "fishy" smells and tastes thanks to my upbringing(a household where fish wasn't ever cooked that well). It'll take some serious work to get rid of that. I also can't handle raw fish even if it's actually not that unusual where I live. I don't really have any intention to learn to like it though, not if I'm not going to cook a lot with it. I should probably learn to like miso soup more than I do though, since miso is used in quite a lot of things.