i'm very aggressive so i never bet

[SNOWBALL]

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Do we usually have to fire a second barrel on the turn here if flop villain calls flop? I usually do, figuring if ahead I have to charge villain to draw; if I check turn, a lot of villains will bet any river, thus forcing me to pay 1 bet anyways.

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against loose passives, they will usually have you beat when they call the flop, and then they won't try to bluff you on the river with their missed gutshots. If they are super super super loose in the blinds then betting the turn is basically for value, because they would have a bunch of hands with a 4 in it in addition to their gutshots and weird backdoor flushdraws and backdoor 2 pair draws.
Some people literally always always always call in the blinds.