Should I pursue a career in project management or call centers?

Why ask us? You should know your talents and potentials and available marketable skills better than any stranger. Working in an area does not make you expert; I've worked in nuclear medicine, for example, but I'm just an informed layman.

If you are a self-disciplined organizer with abilities to concentrate for long periods of time, project managment requires those competencies; if you have a short attention span, need variety and human contact and have strong persuasive skills, telephone sales may be your thing. If your "experience" relates to those activities, of course, and if there are opportunities that can utilize your relevant abilities. Talents in sales are always more broadly applicable and more fungible than project management experiences, which tend to be more narrowly drawn, more organization-specific and more limited in their relevance to other firms.

QUOTE: Which is more relevant to the market needs and more desirable to invest in

Relevance to market needs is way down at the bottom of the list of _your_ priorities. It sounds like you are an employee of these organizations, and there are a thousand more wanting work in the same area. The market will survive, with or without you, so you would be far better off focusing on what matters to you i.e. job satisfaction, stable employment with a good salary and working conditions. In other words: what do _you_ want to do? After you've decided that, you want to ensure you are qualified to maximize your chances, and have relevant skills/experience so you get the job and not someone else.

That's a hard choice to make since they both are quite dangerous if you look at it. But whatever you may choose I wish you good luck!

It seems the question is more, "which is most relevant to your life's journey?" This is a question only you can answer. You seem to be an introspective type of person and the answer would be very important to you. Consider scheduling a time for reflection, when the radio is off, the lights are low, and you have ample time to simply "be". Then start considering where your passion for life work is, what you need to fill in your professional background, whether you need extra formal education, and how your answers parallel with the other areas of your life. The answer will become clear.