The most important thing is happiness and you may achieve it by finding at least a couple of things that really turn you on. Then trying to put your focus on these things as much as possible. Because you'll realize sooner of later that:
1- If you don't have that kind of things in your life, you'll feel empty and your life will seem worthless (and it will actually be worthless);
2- These passions will be your companions in times when you don't have companions;
3- You'll long for these passions when you don't have time for them. They will make you excited about them.
4- Everything comes and go in your life, but if you have a true interest for something, it may stay in your life until you die.
So, if you really want a motorcycle, buy it. If you want to play an instrument, buy it. If you want to travel all over the world, go for it.
These are an other kind of investment. That's an investment on your well-being and happiness.