Screwing around in multi-way pots - good poker or suckouts?

[Ulysses]

6-12 table has turned very loose passive. Nobody is folding for pre-flop raises or even 3-bets and nobody is folding on the flop. However, free card raises on the flop are very productive and people are dropping like flies on the turn.

Here are 3 very similar hands. I'm not sure if I'm playing good poker here or was just going wild because I was up about 80BB in 3 hours. All criticism appreciated.

1) J [img]/forums/images/icons/diamond.gif[/img] 10 [img]/forums/images/icons/diamond.gif[/img] in cutoff. CO-1 raises. I call, knowing the result will likely be a 6-way pot for 2SB each. Flop 4 [img]/forums/images/icons/heart.gif[/img] 2 [img]/forums/images/icons/diamond.gif[/img] 8 [img]/forums/images/icons/club.gif[/img]. Checked to me. I bet, 4 call. Turn Q [img]/forums/images/icons/heart.gif[/img] . Checked to me. I check. River 10 [img]/forums/images/icons/spade.gif[/img] . Checked to me. I bet. 2 callers. I'm good.

2) 7 [img]/forums/images/icons/diamond.gif[/img] 9 [img]/forums/images/icons/diamond.gif[/img] in cutoff. I call and it's a 7-way unraised pot. Flop 7 [img]/forums/images/icons/heart.gif[/img] 8 [img]/forums/images/icons/heart.gif[/img] J [img]/forums/images/icons/diamond.gif[/img] . MP (aggressive guy from my 33 hand) bets. I raise. Folded to MP. He 3-bets. Callers call. I call. Turn K [img]/forums/images/icons/diamond.gif[/img] . MP bets. Folded to me. I call. River 2 [img]/forums/images/icons/diamond.gif[/img] . MP bets. I raise. He calls. I open, he looks and says "oh, no good" and throws over J7o. Someone else informs him I have a flush.

3) J [img]/forums/images/icons/spade.gif[/img] Q [img]/forums/images/icons/club.gif[/img] in SB. I complete in what is a 6-way unraised pot. Is this a bad call? Flop 2 [img]/forums/images/icons/diamond.gif[/img] 4 [img]/forums/images/icons/heart.gif[/img] 7 [img]/forums/images/icons/club.gif[/img] . I bet. A couple of callers to LP (same guy as in hand 2) who raises. I and others call. 4 see the turn of Q [img]/forums/images/icons/heart.gif[/img] . Checked to LP, who bets. Folded to me. I check-raise. He calls. Heads-up to the river, which is 10 [img]/forums/images/icons/diamond.gif[/img] . I bet. LP calls. He flashes and mucks 9 [img]/forums/images/icons/spade.gif[/img] 9 [img]/forums/images/icons/club.gif[/img] .