Value betting the river in multiway pots

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One of the problems im finding more and more is deciding whether to value bet the river in multiway pots (OOP or IP, with at least 3 opponents). Game dynamics is usually loose passive, sometimes loose aggressive. TPTK, TP with decent kicker, and even TP weak kicker im almost always value betting against 2 opponents, even if flush draw hits or an overcard. (i use some discretion, but mostly always) However, I usually find myself in spots, say, QQ in the bb, bet flop bet turn, and on river i have 4 to act after me and a nonflush non straight K falls on the river. Do I check call one bet? Bet out for value? I find myself in this situation all the time; here's another hypothetical:

I have AA, raise from the button, 6 callers; bet flop, bet turn, and ending board looks like 2 [img]/images/graemlins/spade.gif[/img] 3 [img]/images/graemlins/diamond.gif[/img] 5 [img]/images/graemlins/spade.gif[/img] 7 [img]/images/graemlins/heart.gif[/img] q [img]/images/graemlins/heart.gif[/img]. Still 5 callers, I figure for some busted straight and flush draws and weaker pairs, so I bet and get raised, call and lose to two pair and take my lumps. Standard?

What if I'm in the blinds now, same board, say 5 to act after me. Still bet out? Or check call? What i'm curious about is do I make more money off the check call? Say, I save money against all the two pairs, flopped straights, lose money on the hands that would've called my bet on the river but not bet themselves, but maybe induce busted draws or weakish pair hands to bet out and get weak calls after them? Say I hold JJ instead of AA; do I still bet the river IP if it gets checked around? Do I c/c the river if Im the BB first to act?