Hamlet: Act 1

I think after reading Act 1 of Hamlet the main plot points to think about are these:
1) Through out the play, what will the ghost of Hamlet's father really mean.  Is his intent to only have the friends of Hamlet, Horatio and Bernardo pass on the messages or will the ghost bless Hamlet with his presence.
2) Hamlet himself.  Hamlet is constantly mourning his father's death, reasonably, yet he talks about suicide.  On the other hand his uncle marries his mother and quite obviously Hamlet is not pleased by the lack of respect and rawness of his fathers death and his mothers approach to it.  What will Hamlet do about it.
3) What will happen to the love spark supposedly talked about between Ophelia and Hamlet.  What will it hold for the future.