Money and children are the main sources of happiness in our world, there is nothing wrong with spending money on things you like, the trick is you don't overspend and on the other hand you don't underspend either if you are making enough. while I will choose the Audi R8 and currently hunting for one over the 718 Cayman, but I still love the Cayman and I drove it actually, and it's a fine piece of motoring.
I personally will give 2.5% of whatever I make every year to good cause, Charity or someone in need and still spend on things I like and feel good about it.