[Nyororin]

There are three major things that need to be taken into consideration... Or rather that I considered important.
First, it needs be a *living*. In other words, something that can make enough money to live on.
Secondly, it needs to be something enjoyable (to an extent). It`s going to end up being something you do a LOT of to make a living.
Third, it needs to be feasible. There need to be enough opportunities to do it that it will pay off.

A lot of things fit two of these, but very very few fit three.
An artist is usually capable of making money, and is enjoyable... But not feasible as there are few artists who make enough to live on.

The first two rarely change, but the last can change from year to year. For example, there are times when there are so many graduates of something or other that the job possibilities are quite low. A lot of people I know who went into computer science based on the countless job opportunities years before had a rude awakening at graduation when there were so many graduates flooding the market. If something is popular as a way to make a lot of money after graduation, chances are by the time you graduate there will be so many other people wanting to make a lot of money that it`s no longer possible.
On the other hand, we have a friend who had no clue what to do (other than not wanting to do any physical labor) who looked through and decided by process of elimination who is not a chemist in a very respected lab. He`d never been particularly interested in chemistry, but at the same time didn`t have anything against it. He makes more than enough to live very comfortably and had few preconceptions about the job so few disappointments - so is quite satisfied in life.

If you have a dream and are prepared to go through the hardships to follow it - great. But if you are just totally lost on what you want to do, look through job descriptions and look into anything that piques your interest. And then apply the three points above to it and go for the one that gets a good balance.