[pikkupossu]

saying im condescending is whatever
im pointing out a leak, and a pretty big one in most players games.
before i fire any board, im considering all of the above. there is no 'rule of thumb' or 'general rule' its answering all of those questions and then selecting a bet size.

the solution is rarely bet more, its bet an amount that will give you the most information about villians hand thereby allowing you to play the turn and the river optimally whether it be extracting value, making them fold or making them make a mistake.

forgot to reply to OPs stuff

hand 1: fine. if you think he plays Kx like this river bet is fine. against these type of fish that spaz river bet anytime you check the turn, i dont mind checking the turn and jamming over their river bet. i mean you have the board completely crushed and he doesnt fold Kx to the river jam either. he might even hero call with 99 or something cause you'd never check back the turn with Kx either.
hand 2: lead flop, as played 3 bet flop and dont fold.
hand 3: raise turn. hes drawing to spades.
hand 4: i can see myself betting less on the turn
hand 5: i thinking shoving is overkill, i like a 'block bet' size on the river. something like 10, give him rope to either make a move cause he thinks you are weak, or call down with a weird holding.
hand 6: meh dont hate it dont love it. if theres a spot to click it back, this is definitely on of them. flatting is fine too. as long as you find a way to put money in you are fine, say flatting and min betting a brick on the turn if you think villian will spaz is fun