I've always found building to be a great chance to escape from the real world dramas we all face day to day. It's been my fall back safety net since I was about 8 years old and now 32 years later I still use it to relax and unwind. It's heaps cheaper than building them in 1:1 scale and when I'm saving dollars for the full size toys I model also.
At Christmas I was diagnosed with liver cancer so since then I've been hitting the models a bit harder to act as a distraction from the dozens of tests I've had, hopefully in a few weeks time I'm heading in for surgery to remove a large section of my liver and remove the cancer, I'll be laid up for awhile so it'll give me even more chance to drag out and finish some more stuff.
We all need an outlet to unwind and forget about the dramas of life, I like building models.