I've also got an a77. It's simply a staggering camera. A few things that really stand out for me are.
The EVF, of course. It's so far ahead of anything in m4/3 it's just silly. And even though the panel is also used in the NEX7, due to the better lens and eye releif it's miles ahead of that as well. It's stunning to look through and the amount of information it can display is amazing. As mentioned pre-chimping is worth it's weight in gold.
The 16-50 2.8 "kit" zoom is as good a short zoom as I've ever used. It's easily as good as its Canon and Nikon FF counterparts.
The electronic first curtain shutter. I never turn it off.
It feels exceptionally good in the hand. The optional grip is the best I've ever used. And you can customise most of the buttons to suit your personal tastes.
The AF zeiss lenses are superb.
Low ISO is unbeleivable. And higher ISOs are better than the forums indicate.
The not so good.
There is no "my menu" so you need to go through the whole thing for the few functions you need, like formatting a card.
And *for me*, that's it. If
Sony introduced a my menu function I'd have no complaints. There was a lag issue but the last firmware completely eradicated that. The serious video guys would probably like more control of the audio and you need an adaptor to use studio triggers, but these are nothing, really.
Gordon