Some people play games with getting back to people. If you get back to them too soon, it is said, you are coming off as too desperate. This is ridiculous. Be courteous and let your date know your intentions in a timely manner. Don’t treat this as a power play, competing for who can come off as more aloof and indifferent. Okay, you don’t want to act desperate, but nor do you need to deliberately play shtick.
Be natural and real. If you had a nice date and you like the person, there is no point in “playing it all cool” hoping that will get the other person more interested. Maybe that works for a date, but, in the end, it is a charade. In the end, decency and mentchlichkeit will do a great deal more for your prospects of success.