Hi Dude,
A very good question indeed. Personally I never fly for fun on the simple basis that I just can not afford it on instructors pay! Why pay when you can get a stude to pay for you? However I get on very well with my studes and we do have the odd 'jolly' now and then where the emphasis is less formal and more fun
To put it in perspective the average instructor will need to do between 6 and 10 hours flight instruction for just one hour private flying............this makes it dificult to justify.
Do I miss private flying?..............hell YES! It is something I really miss actually.
Cheers
JWF