How Much Is "Enough"?

[Bryan Hancock]

So life has been good since the mortgage crisis doldrums.  Projecting growth over the coming years it is clear that we'll do well if things go as expected.  At the ripe old age of 36 I am beginning to think about "retirement" and what I would like for an average day to look like going forward.  I have probably worked 80+ hour weeks for the last 3-4 years and the benefit of all of this hard work is starting to pay off.  It seems silly to keep working this hard going forward given that we probably have "enough" now to start living the life of our choosing without all of the drama and hassle.  

Given that real estate investing can be very lucrative it will be hard to stop investing.  I am thinking of dialing things back some or diversifying where my investments are parked.  Doing something new and exciting may be worth investigating too.   

At what point do you feel like you have enough FU money to dial things back and stop working so hard?  25X annual expenses seems like a common litmus test, but for real estate investors it may need to be lower given that the investments are quasi active.  

Any thoughts?