how do you like it?

Right now we live about an hour away from DH's parents. We have an opportunity to live anywhere from a minute to 10 minutes away from them. We are looking to move closer to the city and we can get some cheap land and FIL builds houses so this is a great opportunity, financially, to move. I am very worried about living *too* close to his parents for the fear of the drop-ins. I love his family but I would also like to keep it this way

Has anybody had any experience with this? Positive or negative?