I've known about both these series for some time, but I was too busy checking out more recent production to give them much thought. After what I had been watching previously this was quite a nice refresher.
Soul Eater is your standard shounen combat series, but with enough twists to keep it interesting. The art style remind me of flash videos by Vinnie Veritas, the designs are fun and very emotive of character personalities. Soul Eater is doesn't trip over poorly reasoned combat because it doesn't take combat seriously. Bleach and naruto try to enact combat realistically within the rules set up for their world, but they leapt into common combat pitfalls such as character inexplicable saving their best moves until the end rather than using them immediately or combatants becoming stronger when injured rather than weaker. Soul Eater doesn;t even bother, and many of the early fights involve comical slip ups that in any serious fight would have guaranteed death. This has the effect of making fight scenes more fun and more interesting. Soul Eater doesn't tend to drag out the action either unlike Bleach and Naruto, though there have been two filler episodes so far. I also really like having the boisterous, perverted, tough guy character that usually stars in shounen fighters allocated to an important but secondary character. The leads star a studios and hardworking female and a reserved and unenergetic male. Overall a much more enjoyable series than Bleach or Naruto, though still lacking depth. I rated it a 7 in comparison to Naruto's 6 and Bleach's 5.
Eureka Seven starts out with a very cliche shounen mecha beginning, but quickly grows well beyond that. The series almost uses cliche intentionally to increase accessibility before later funneling viewers gradually into a more serious plot. Renton is a great execution of the standard shounen lead, being far less annoying than many of his colleagues. The show does a very nice job of not trying to nonsensically force the plot, making the story flow very naturally from the initial conditions. I have yet to finish it, but I like it a lot so far and would rate it an 8.