I actually have zero idea what TAbbott would be like as PM. He could be brilliant or dreadful. Because his entire tenure in OppLeader has been about attack, attack, attack, attack, attack. He has been deliberately vague and very very small-c conservative with his own policy announcements. Some of that has been woefully misguided and exposed him badly (NBN in particular pre-election), but it would seem that what it's done is prevented the government from being capable of casting a too critical eye over their own policies - given he has the always-useful justification of "you can't make policy from opposition". Really it's inline with the philosophy I posted early - for the Lib party, the entire object is government. Once you get to government then you start working out detailed policy with the extended resources you get from government. On the other hand, the ALP has always been more conducive, IMO, to ideas, so they tend to front up with big ideas to get elected to government, then try to implement them from there.
The former is better in theory but it leaves an awful amount to chance and does demand an unusually great deal of trust from the public.
The paradox is only a conflict between reality and your feeling what reality ought to be.
~ Richard Feynman