at higher levels people will jam with MUCH less value than people at the 50s did. for example, if someone jammed me on the turn, i could expect something like these hands from a lot of players:

- any str8
- any set
- wraps
- any 2pr
- tp + nfd
- naked nfd
- oesd+ (for straight draws)
- gutter + pair
- gutter + fl draw
- naked tptk (if board looks draw heavy)
- naked bluff (if a scare card hit)

note that i didn't describe the board texture since it often doesn't matter (the lower you go on the list, the more that board texture matters). in fact, i would say that when scare cards hit that make your hand but still leave a draw out, you might be more likely to get jammed by someone representing the made hand when in fact they only have a draw (e.g., nfd on a str8 brd).

what i find interesting about your reply, pz, is that you hit a big nail on the head with regards to playing versus these kinds of players. the players described above exist up to the 1000plo level (as far as i have seen), but they tend to decrease in frequency as you move up. i see a lot of aggro players (probably nlhe xfers) misplay hands against these "50" (my term) types of players.

It took me a couple of days to get to this, but good stuff.

The only points I would make, from my observations, or what's worked for me so far is that for draws and big pots, I generally look for a double draw or a draw and a decent made hand:
straight draw + 2 pair
straight draw + flush draw
flush draw + pair/2 pair
etc..

As far as flush draws, if I don't have the nut draw, I never like to be the caller. If I can't be the one raising or shoving, I don't want to play it, especially in a big pot. Still, if I have something like a 9 or T high FD + another draw/marginal made hand, I have no problem being the aggressor in a big pot because they either give me backup outs or block my opponent if they have a bigger FD.

In reference to Roy's aggressive theory, I believe you are both correct to some degree. Some people will let you run them over, some won't. The thing is usually if there is an A or K on board, they might let you do it because they expect you to be raising AA/KK. You are less likely to get away with it on draw type board and occasionally on rag boards when you find the guy who wants to call with a pair. However, when the card that puts a straight on the board does hit you can occassionally take it away and a lot of times they basically tell you what they have so you can tell if the card hit them or scared them sometimes.

The other day, I was playing a hand where I had AKxx and flop was AJT no flush draw. Opponent called my flop bet and then when I checked, he quickly potted the turn. Right there I knew he had KQ and waited a card because he wanted to make sure the flush card didn't hit or the board didn't pair. I had the nut-flush draw + 3 outs to a tie with the straight. I called because when the board paired a T on the river I bet out 3/4 pot and got him to fold the straight.

So in general, I think they call when:
- they have a straight and there is no flush or better on board.
- they have a flush and the board isn't paired.
- they have bottom set or any 2 pair and there isn't a straight or better on board.

And again, yes, they will call down for their flush and then not even bet it for fear that they are up against a bigger one.
-Wraps are basically the toughest thing to figure out because a lot of times they'll just call and, unlike a flush, you can't be sure if a certain card fills their straight or not.
-Sets they are going to be aggressive with unless there are 3 to a flush or a straight on board, then, sometimes they'll just check/call a c-bet.