Well it depends on what you mean. The genre of Hanasakeru seishounen is Shoujo (woman/girl manga or anime) and Reverse Harem (Main character: Girl who is surrounded by hot guys/men).
Animes of Reverse Harem (that i know of) are: Fruits Basket
Ouran High School Host Club
Wallflower
Pretear
La Corda d'Oro
Saiunkoku Monogatari
Harukanaru Toki no Nakade Hachiyou
Angelique (all series)
Ashita no Nadja
Shugo Chara
Fushigi Yugi There are more also at this site (and with more detail of each series/shows): http://myanimelist.net/clubs.php?cid=688
I'm an adult from America and I like anime and manga. Also, my adult friends like manga as well. So yes adults in America like anime and manga.
There are loads like animefreak and anime crazy
try angelic layer
I think it's more a matter of opinion but if you look at what people call "cartoons" and what people call "anime" then I would consider anime to be more Japanese than cartoons. Usually though, if it's stupid I consider it to be a cartoon.
Yes, you can try Pita-Ten or Mamotte! Lollipop, which are similar
Any popular anime streaming website like gogo anime.
I'm an adult from America and I like anime and manga. Also, my adult friends like manga as well. So yes adults in America like anime and manga.
There are loads like animefreak and anime crazy
aquarion evol
There are many adults here in the US that like both anime and manga - myself among them for example .
just like any media there is good and bad. there are hundreds of anime in the world, out of those there are likely to be so bad ones.
Witch Hunter Robin .
try angelic layer
Yes, Edward and Winry.
One Piece ,
Yes, the first episode can be watched on YouTube.
What's the color of the protagonist's hair? What do the other characters look like? What is the theme of the anime?