Talking out loud here:
If he flopped a baby flush with a suited connector (like
[7d]), wouldn't he raise to chrage you if you have the Kd or Jd?
If he flopped a set with 44, shouldn't he raise for the same reason?
AK or AQ probably 3-bet, right?
Same for QQ and AA (Or maybe he got tricky with AA? doubt it)
Would this type of player flat call with KQo (so he'd have the Kd) or AJo (having the Jd) or ATo (having the Td)?
Would he just call PF with JJ (having the J of diamonds)?
I think he has a pair plus flush draw (with the K or J of diamonds). So bet again