Kingdom Hearts

NOTE: if you don't answer question 1, then quit reading as there is no point.

here's the question. who hear has heard of Kingdom Hearts? and if you have, have you played it. and if you have, what do you think of it? and if you think highly of it, which installment is your favourite? and if you have a couple of the games, I'd like to "converse" with what you on think about the series.