Aviation
It is a difficult, frustrating industry to succeed in.
It frequently requires a near open ended financial commitment.
It requires a consistent and high standard of medical fitness.
It comes with absolutely no guarantees.
It has a very high rate of attrition.
It is intolerent of failure.
It requires a very high degree of personal commitment.
It requires luck.
For some people all the drawbacks still are outweighed by the desire. The risks are worth the difficulties.
My one piece of advice would be that if you are not sure or not dedicated to the pursuit of Aviation as a career then it would be wise to consider other careers. The competition ( just read these forums) is enormous and even then the drop out rate for all the reasons listed ( and more besides) is high !
On the other hand if you accept the risks and luck is on your side then it can be very rewarding and well worth going for.