I must say I am quite annoyed and tired at the number of times when a writer has depowered Galactus or underestimated his might and what he is supposed to represent.
One of the biggest rapes according to me was orchestrated by an artist and a writer that I otherwise admire but who in this occasion just betrayed big G: during the Hunger arc, Galactus is being depicted as an idiot who doesn't understand much of the way the universe works and who, in addition, can even be hurt by one of Thanos's blows.
No, no, no I say. Thanos might be powerful, be he is still on a very different power range. Galactus eats planets for breakfast, he is almost omniscient and has been monitoring this universe almost since the day of its creation, you just can't make him an idiot who can be hurt be a demi-god.
My favourite recent interpretation is the one that was given to us by Abnett and lanning in the "Final Hour" Nova issue (number 14 I think): Not only Galactus but even his herald are way above the classic powerhouses of the Marvel universe.
What do you think, don't you believe the devourer should represent a constant and some sort of scale in the Marvel universe?