|Bleach "purpose" is unclear. And I say unclear because it all started over the premise of a boy being able to see ghosts (Ichigo) and it's now explained that the reason for that was because
Spoiler (mouse over to view)
Ichigo is the son of a shinigami and a human
I assume that the story will go on until the past of Ichigo's father is disclosed and also until the hell realm is introduced. I assume that's why the author has taken some time off, to think things through.
And also, contrary to both One Piece and Naruto, Bleach's ending is pretty unclear too. By now everyone should know that the One Piece (One Piece's hidden treasure) is going to be the value of friendship (or nakama, as you prefer) and as for Naruto I actually see 2 possible endings... 1 in which Naruto actually gets to be hokage and the other where he dies after facing Sasuke.
Quote from Kaitentsuki
And why are most/all Uchiha so quick to nerdrage with hatred?