Here are all the anime and manga that I have watched that is good for me...
Ichigo 100% - the best manga written for me
Ai Yori Aoshi - the manga is better because it has lots of things that wasn't included in the anime
Bitter Virgin - has a very good story but a bit sad
Suzuka - it's typical high school life, romance and mixed with sports
Eureka 7 - very sad but romantic
Death Note - you'll learn a lot from this series
Berserk - if you like gory stuffs and wars
Pastel - it's very funny and has a lot of romance
Lilim Kiss - has a lot of romance but very ecchi hehe...
Vampire Knight - about vampires and humans co-existing together,has a lot of romance too
Black Cat - if you like action and adventure
I"s - high school life and romance
Hot Gimmick - it's funny and has romance
Id_Entity - I hope you manage to find this manwha but it has a good story just like .hack but way better.
Suzuka - for me this anime never gets old
Ai Yori Aoshi - you can also watch the anime it's also good but the manga is better
Death Note - the manga and movie is way better than this but it's still pretty good because they have special effects while people write names in the note
Love Hina - classic!
DN Angel - if you like mysteries and action has a bit of romance too
Midori Days - comedy and romance
Black Cat - the manga is better plot but the anime has suspense because you can see how quick they move because of the effects
Kimi Ga Nozomu Eien - very sad it can make you teary-eyed, has romance.
Air - this anime can make you cry!!
Shuffle!- high school life romance
Ah!My Goddess - the anime is better because the manga was a cliffhanger, anyways this has romance,school life and goddesses
Dragon Ball - adventurous has action
Yuu Yuu Hakusho - has adventures and action too
Full Metal Panic - funny,action,adventure and romance
Fate-Stay Night - has a good plot and lots of action
Detective Conan - you'll learn a lot about solving crime from this anime
Kyou Kara Maou! - has a good story and has a lot of adventures
I guess that's it for now I can't remember other good mangas and animes I've seen and read, maybe I'll come back again to finish this list.......