They all have advantages.
Manga has a broad and unique selection, yet the art style of manga might be mediocre.
Manhua contains my favorite fantasy setting (Cultivation) compared to Manga and Manhwa. Manhua art style is inferior to Manga and Manhwa, but there are some good ones like Soul Land series, Battle through the heavens, and so on. The stories in Manhua, on the other hand, feel more empty if you eliminate the good ones, such as the Soul Land series, BTTH, and The Great Ruler.
Manhwa are Korean comics that include really good ones such as Tower of God, G.O.H.S, Solo Leveling, and Second Coming of Gluttony (I recommend the novel). They frequently have the gaming system or point system, which I generally dislike, but unlike average Manhua, their story doesn't feel that empty. Unlike Manhua, Manhwa prefers modest heroes (for example, even though Sung-jin-woo from Solo Leveling is chilly deep down, he is a guy who despises hubris) and the art of Manhwa is better on average. It becomes questionable towards the top, such as when comparing later series of Soul Land (3 and 4) with Solo Leveling.
Overall, I like Manga; the MCs' characters aren't my favorites, but Manga has taught me MUCH more than any Manhua or Manhwa has ever taught me.
