depends on what type of player youre going up against...
you will get paid off better by a loose player if you hit your hand...a rock wont put any more money in the pot with QQ after another str8 card hits...if im playing against a NIT, i'd want the QQ bc hed prob fold on the flop or turn...i myself actually hit a nice little hand last week with 63 suited..flop comes 245 rainbow, check/check...turn comes Ace of diamonds, bringing 2 diamonds to the board, i bet out half pot, guy reraises me instantly, and i put him on a hand like Ace rag to begin with so i thought he had two pair and didnt want the flush to hit...so i waited and smooth called, river comes K spades, i overbet the pot, he shoves and i take all of his money...and we all lived happily ever after...the end
PS 63 suited/offsuit is easier to fold with a pr and a gutshot to a Tight aggressive player, i feel...