I would greatly appreciate your advice and ideas regarding possible career path options.

Matching most ENFP profile descriptions, I identify myself as an individual with some EXTREMELY unrelated skills and interests, from the creative (music, web art/design) to the encyclopedic (history, geography).
I introduced myself already as a business and social sciences student at university level with plenty of psychology courses, and each of the interests/skills I mentioned here share the same importance and value in my perception - some of them having started many years even before I finished middle school!

Consider also that although I am still a student, I ran a small business in the travel sector and have founded several non-profit projects in the field of environmental sustainability. In each of these projects and business, I always used the full range of skills I used to have before, however...

There's one thing that I am very sure about: even though I enjoy entrepreneurship, I don't see doing business as my ultimate "professional identity", but rather as a skill to promote. I think the main problem I would feel in being "just" a businessman all my life would be the lack of "intellectual" challenge.
(Would appreciate your thoughts and insights especially about this paragraph!)

Holding everything else equal to the ENFP standard, I value the so-called "intellectual" a lot.

Two "realistic" career directions I have given serious consideration during my time at university, BUT rejected include:
- Management psychology (or Human Resources development, training, recruiting, etc)
- International development or diplomacy (facilitating conflict resolution between countries)

One option that still seems viable is:
- Academic researcher/professor (in the different fields I am interested in) with a side-business 

Among the non-realistic ones I still have:
- Exploration or emergency pilot
- Orchestra conductor
(Non realistic simply because unless I become a millionaire (not possible with small businesses and slightly negative attitude towards "profit-making"), I would not be able to fund the training for those careers!)
Yet, I have a considerable amount of "basic/amateur" experience even in these two (have written actual orchestra music for non-commercial projects, very deep interest in aviation, maybe even slightly more than all of the above).

To sum up: as you can see, I have many interests in often UNRELATED areas, and to be successful in either of them I would need to train and invest a considerable amount of time.

Thank you for reading all this block of text. 
Maybe you have better ideas for me?

Please note that I don't mean the word "intellectual" literally.

What I am trying to say is that I would like to use sophisticated knowledge or skills in whatever I will do
(even if they are different and unrelated!)

To be a pilot I would need to master specialized technical skills that would be useful only to fly a plane.
An orchestra conductor would need several years of higher education in music.

However, I would never like to be confined to the walls of either specialized skills.

If our economy allowed being both (half week pilot, half week conductor) - and there were not so high costs associated with the training process - I would probably become both pilot and musician.

One successful example is probably Bruce Dickinson, who first became a famous musician (Iron Maiden lead singer) and then learned to become a commercial airline pilot.
Unfortunately, I think not all of us will have the same luck as he did, to find the opportunity and time to develop those entirely different areas.

What do you think?

How far ahead are you trying to plan your career path? If you're thinking about what you'd like to be doing, say, ten years from now, I wouldn't plan too specifically. So much can happen in that time, or even half that time, and how you feel about your plan now may completely change well before then.

Personally I've found it more useful to plan my life progress in terms of a direction than a specific outcome. That way, no matter how things change, at least you're making progress. Also, not getting attached to one very specific outcome makes it easier to see other opportunities along the way that you may not have considered. My life as it is now is virtually nothing like what I would've expected it to be if you had asked me five years ago - but I'm loving it nonetheless. I think that by focusing on doing what you know will take your life in the right direction, you'll naturally end up in something that feels right to you. The skills and knowledge that you develop along the way will open enough doors for you that the path will just make itself clear.