I came across this manga by chance several years ago back when my taste in manga was a lot more typical. I wasn't into the realistic art, and didn't read it. Although my taste changes greatly since then, I remained uninterested until the news of the anime adaptation came across. Wonder what the heck would intrigue a studio to green-light such an old short manga (which wasn't even popular back then), I decided to try it at last... AND WHAT A READ IT WAS! I end up reading it all in one sitting!
Enough with the rambling. Let's get straight to the story.
Level E is actually more of an anthology. Every story is loosely related based on one character, the (idiot) alien prince, who walks a fine line between heartlessly irritating and darn funny (to the readers at least). To call this series a comedy would be somewhat misleading though because some of the chapters can get fairly serious. Still, that isn't a bad thing though. This mangaka can seriously write, and one of the serious chapters feature one of the best stories I have read in a long while. The funny chapters also feature very original humor unlike what I have seen anywhere else.
The minor downside though is that the characters aren't quite developed due to the anthology format, and even the idiot prince who is featured in almost every story remains rather one-dimensional. However, all of the characters are written extremely well, and while I don't get to know them that well, I do feel for them as a character (even the prince. Then again... I have to admit that I have a soft spot for his type of characters.)
The art isn't consistent, however, and it is quite easy to notice. The last chapter in particular features the sketchier-less-polished kind that most fans should be used to from the later work of the mangaka, and even a section in the middle of the stories feature art and character designs that make me think of HxH (which looks quite weird when they are next to characters with more realistic design.) I don't know whether this is an intentional experiment in style by the mangaka or not. I do prefer the more detailed and realistic style though because I think it suits the satire nature of this series better. It also proves that the mangaka can really draw when he feels like it.
Overall, this is a surprisingly amazing read despite some inconsistency, and I would encourage anyone (who love good stories) to try it. Just don't expect it to be entirely comedy though. 10/10 mainly for the originality.