standard situations

There seem to be situations that happen frequently and are not really easy to deal with (at least for me), mostly because of the texture of the flop, the chance in those situations seems high, that a bunch of players go bust and one player wins big.
One situation would be when the flop comes in one suit and lower cards.

If that happens, it seems there are often so many people with 'good' holdings, that it ends up in one big showdown where someone wins big and several people might go bust.

On a rather loose table, some of these hands will probably be held by someone seeing a flop of 3 suited cards:

1. Two lower cards of the same suit as the board (a made hand, but low flush).
2. One high card of the same suit as the board (drawing for a high flush, maybe even nuts flush).
3. Someone holding a set after the flop.
4. Someone holding an overpair/two pair after the flop.

If I think about what each of those players actually wants, I realise Im not really sure:
1. Does he want people out who are drawing for a higher flush? Is it at all possible to get someone out who is drawing to the nuts flush after the flop?
2. Does he want cheap cards, or get value in the pot in case he hits the nuts flush?
3. Should someone with a set stay, because if he makes a fh, he has good chance to stack someone?
4. Fold at the first sign of aggression? Or look at the turn/river and hope for busted flush draws because no more suited cards came?

The chance to make a flush with 2 cards to come is about 35%.

The chance to make a fh when someone is holding a set after the flop and two cards to come is 28%. Not as high as the other guy making his nuts flush, but if he really does hit his fh, he has a good chance to stack at least one player...reason to stay?

I think about this kind of situations alot lately because it seems I play weak then, and more importantly many other players also seem to have the same problems (probably not at higher levels, but where I play ;)).

Something else I have been thinking about is, can those situations be exploited by lots of aggression? After a flop like this, many players hold something good and want to find out where they stand, because they realise the board is scary (it is scary to all of the players above).
So Im thinking the most aggressive of the players above might have the edge?