An exploration of why Hamlet delays the act of revenge Hamlet is a human being, and he is an emotional human being. He feels guilt, remorse and has responsibilities, yet at the same time he feels pride and a sense of duty. He is quick, in Act one, scene five to take on his role of avenger "Haste me to know't, that I, with wings as swift As meditation or the thoughts of love, May sweep to my revenge." Hamlet is passionate about his role and swears to "wipe away all trivial fond records" and to solely concentrate avenging...
to loose.

In conclusion I think the lack of resolve stems from his personality, which was too uncertain off anything including his own feelings to commit himself to action, he had too many internal conflicts and his basic sanity of knowing that killing is fundamentally wrong. Hamlet also became more and more aware of complexity of the human condition and the constant conflict between heart and mind and soul and so suffered paralysis of action, like 'a feather caught in a cross current'.

On the other hand he was probably just a procrastinating Libra, most probably with Scorpio rising!