I guess I can give out some more personal opinions about some animations:
Boys Be - This is pretty much a slice of life series, but rather than focusing on a lifestyle of a specific person, there are a series of people that this series examines and try to express it an an individuality that anyone can love. It is a decent animation, but I am not certain how the American Dubbing is like.
GetBackers - This is a pretty nice animation that involves two people working in a retrieval-for-hire service, hence the animation's title. It involves magical powers and plot twists to some historical artifacts in our history, which makes it a pretty decent watch. The downer to this is that the ending falls flat, like a brick in a 100-g room. I would have expected more, but it just left me with an upset.
Kimi ga Nozomu Eien - This is like "Its a Wonderful Life" in animation. So much turmoil in this series that you hope that it would end, so that the protagonists can at least have their dignity and such. It deals with a bunch of adult issues and is not suitable for people under the age of 13 and such, but overall, it is a strong series that strikes the person's psyche.
Last Exile - A GONZO series that involves two ordinary children in an extraordinary war. It digs deep into the idea of aristocracy and the balance of power. You root for the protagonist as he tries to complete what thier fathers died for, peace.
Maison Ikkoku - One of the older romantic genre series. It has the same art style as Ranma 1/2, Urusei Yatsura, and Inuyasha, but rather than involving martial arts or mystical beings, it revolves around a hopeless man trying to succeed in life while trying to have the courage to ask his landlord out. Overall, it is a nice series.
Saikano - This series involves a girl transformed into a weapon of destruction to defend Japan from invading countries. It is a very harsh series that involves deaths of many of the secondary characters. It makes you wish that all of the violence can stop, so that the characters can at least live a normal life. It struck a chord on my nerves, which I stopped midway through the series, as I couldn't watch them suffer (it was the same time I was watching Now and Then, Here and There, so my emotions was already at its breaking point).
Stelliva of the Universe - A space drama that involves a bunch of children placed into a world after its destruction. It focuses on their hopes of being the best that they can be, while engaging in conflicts that involve invading aliens, warring nations, and world-ending phenomenon. It is a bit heartwarming at some times, and overall is a good series.
Batman the Animated Series - Animation is Animation, and Batman the Animated Series is, what I considered, one of the best American animation series of all time. It had a dark aspect to it and revolves around one of the greatest voiceacting that I heard. Once your hear Kevin Conroy as Batman and Mark Hamill as The Joker, you can not hear them in any other reincarnation of their characters. Its influence was so great, that even a series-only character, Harley Quinn, entered into the comic canon. There is a reason why this series won an Emmy.