At the age of 18, when I had to choose my studies, I briefly toyed with doing philosophy, but ultimately I went into engineering, mainly because I was worried about job opportunities with a degree in philosophy.
After a couple of years however, I felt myself drawn back towards philosophy, and whereas I completed my studies in engineering and work in that field, I am regularly studying philosophy by myself, mainly by reading philisophical works (currently mainly ancient Greek, next year I will focus more on Roman Philosphy).
Besides being an agreeable passtime, I found that it has had a hugely beneficial impact on my life, even within my profession as an engineer.
Philosophy teaches you to look at a certain problem from different angles, and often shows you an angle which other people didn't think of.
Cool! Philosophy as a supplement to another discipline is very enriching. Peter Thiel, Jim Rogers, George Soros, Reid Hoffman, Bruce Lee and many more have said that it has given them many new insights in other disciplines.