согласен? согласный ?

Is there any difference of sense? Is one of these a gramatically more correct form of answering?

я согласен.
я - согласный.

Thank you very much.

First one is much more accurate considering grammar and style.

Isn't the second one gramatically incorrect? Like the - shouldn't be there should it?

Сказала буква А «я - гласный», а сказала буква Т «я - согласный». <;-)

Something that might help: think of adding "one" to the long-form adjectives:

она красива. She's pretty.
она красивая. She's a pretty one. (among others)

The short forms are more absolute statements, the long forms seem to be relative.

Вот можно тоже посмотреть:

Ксения Емельянова.

"Способный" или "способен" - вот в чем вопрос?!
http://www.bashvest.ru/test/showinf.php?id=7355

"согласный" may be used just for sound characteristic: "гласный-согласный" - that's it

Thank you all. :D