I agree that slowplaying is terrible, but I think that playing hands slow is not necessarily bad. For instance, there is no point in playing the KKxx hand fast here, no matter what the situation is because people are going to call ur bet with a FD and then someone else might call with a wrap SD and you are behind if both of these people are in. What I think is better idea (once again as beset said, not knowing what the other players are like) is checking this flop and letting someone else raise. So lets create a theoretical situation since pocket3s didnt give us any real parameters. Since he said he was playing .25/.5 PLO, lets say that there are 6 callers PF so ($3 in the pot). 2 villians and hero each start with $70. The flop comes AKx with 2 hearts. Your in UTG+1 and the sb and bb check. I think with 3 people behind u can check this. Now here are the 2 scenarios. (1) The next player bets pot, fold, call by the button, fold by the blinds, and now back to you. There is currently $9 now in the pot. Which means that you can re-pot so that u call the $3 and put $12 more on top. Its now $12 to the initial raiser. If he raises then he almost definetly has AAxx here, but he could even had top 2 or a wrap SD with FD. (a) But lets say he calls here and the next player takes a while and then call. When the blank turn comes ur all in and with ur 50-21 = 39 and with 12x4= 48 ur all in. So this makes it so that the other players still do not have odds to make this call on either a FD or wrap SD. (b) is where the initial raiser calls and the other guy folds. So now there is 12x3=36 in the pot. And when u pot it on the blank turn u will almost always take it down there. Or you could even try and entice the person to call by betting 2/3pot or something like that.
In scenario (2), the guy behind u calls and the button raises putting the pot to $6. Now you have 2 options. (a) You can re-pot to $9, essentially isolating this pot, unless someone wants to make a rather bad call (not including possible implied odds ... but i can explain why there really are none if someone makes this call). So you dont have this other person with the FD (unless its the nuts, which then u might get a call) will fold and ur back to being down to the button where if he just calls and a blank comes on the turn u can pot it again and take it down on the turn and if a heart or SD card comes, see what happens from there. (2) you just call (something i would rarely do), and if someone comes in behind u, u bet out a blank turn or if its folded around and just u and the initial raiser, try for a check-raise on the turn (since this is essentially why ur smooth-calling this flop).
In all of these situations you are using aggression, but its not blind aggression. Since there are almost always draws out there, its all about timing the aggression properly and unlike NLHE where it is very rare that you would check this flop, in PLO, especially when the pot is small, its right to not bet ur believed nuts.
Also, about this river A[img]/images/graemlins/heart.gif[/img]. This is the best possible card for you, if you are really worried about this card then u can check/call anything. The chances of you being behind after this river is much less than 1/3, but I have already posted a lot in this post and if asked I will excplain more in another post.