nope, not just you haha my thoughts exactly
In media in general, the MC tends to be designed as an "average" male, which is why they look the same as other protagonist.
Think Kirito in anime, and Jin woo in manwhas. They both generally have short black hair, and black eyes. They're probably very jacked, but you can't see that through their clothes, which makes them look slim and lean. Which I guess is how most asian actually look(?)
So this is not your imagination, you just took notice of a design pattern to attract audience. Congratulations.
It's the platonic ideal of an everyman
he also have similarities with mc from solo max level newbie
Is something in my eyes? Why do most MC look like Sungwoo from Solo leveling