I think that with the buy in, combined with the stats, I am probably opening a touch more to like 2.5-2.8bb bc the villain is more than likely going to call, and when you connect I am trying my best to get it in.  It appears that the villain likes to splash around a lot.  However, on the c/r alarms should be going off.  I do agree that the c bet is to small.  It appears that we are weak and in many times when we bet like this, we do it to balance our range.  I don't mind the bet size if this is how we have been betting our c bets all along to induce action.  In saying this though, this goes to the villain we are playing.  I really don't think this player is thinking about sizing, so I even bet 2/3 pot here looking to get it in.  I think when he c/r flop, he has a flush draw, or 2 pair+.  However, KQ can be in his range and you are ahead.  I think at this point the decision to 4 bet get it in on flop needs to be made right here.  You are either ahead or behind post, and by calling the c/r, we need to be prepared imo to get it in on the turn.  Sure getting it in on the flop is higher variance, but I think a lot of times you will be ahead.  By calling the raise, what are we going to do, when a blank comes?  Fold?  This where it is so important to have the plan of what we will do pre.  What did the villain have?