[Specialwon]

Hand 1: This happens from time to time, AA is a great hand but not invincible, c'est la vie.

Hand 2+3: KK is also a great hand and you are PROBABLY ahead on the flop. But, smashing all your money down like that is wrong because you scare away anyone with a weaker hand who might have called a smaller bet. Usually the only guys who call that bet either have you beat or are on a strong draw. So, don't smash flops like that, bet a sensible amount, maybe 2/3 pot.

Hand 4, OK I guess, but again I don't like this gleeful smashing your money down on the river, often only a better hand will call.

Hand 5: see hands 2 + 3.

Edit: I agree with WGCRider about your preflop raising.

If you raise up, the usual rule of thumb is 4 x big blind plus one big blind for each limper. When reraising, I usually bet 3.5x raise plus one raise for each caller.