Angel Densetsu is an episodic comedy shounen manga.
It features various very different characters, whose interaction makes up for a funny but also strangely honest and refreshingly different manga, that manages to life without eye catching stuff like "fan service" or gore (I don't generally dislike these though, Franken Fran is a masterpiece almost only consisting of these).
The art is unusual at first, and becomming more generic later. I'm not sure if I prefer the later volumes with the typical eye pleasing manga looks, or the beginings with the unusual, but well done art, that perfectly fits the premise.
Anyway, since both art and story developed in the same pace and into the same direction, neither of the art styles seems to be out of place, rather than underlining the change of understanding, that the people surrounding the male lead have of him.
Also I have to mention that this manga, in fact, adresses some serious problems of society. it focuses on violence and prejudice, but there are some othe points as well, all of them depicted in a funny, yet not silly and strangely realistic way.
In this regards it is surprisingly deep, without getting too serious, or "Anvilicious".
I would say that it's a true masterpiece, being able to reach a relatively wide audience without turning generig or mainstream. You won't find many comics (or other types of stories) capable of doing so, which is the reason I can recommend anyone, not just shounen manga fans, to take a look at it, and see if it piques his/her interest.