I'm not a QQ player since paytables in nearby casinos aren't very good. In fact, even during my Vegas stays I can't recall ever seeing a full-pay QQ game.
But I did wonder (in general) while observing if you ever break a FH if the pair has a card helpful in making a QQ:
For example, you are dealt 7-7-7-3-3, is it advantageous to keep just one of the 3s, hoping the 5th card is a either a 4 or another 7? Seems like on a 5 Play, for example, you are risking the 225 for a guaranteed FH (with FH=9 x 5 coins x 5 hands) for a much harder-to-get QQ paying just slightly more than the total FH payout. And that's if you even get a QQ or the natural 4K.
Thanks,
Mikey