I was always captivated by the oil painting. I remember we had a book store just across from my university in Vitebsk and I loved to come there to look at books and stationery. And in a display case they had real oil color tubes laying for the students of Design of another university. I remember my awe of those tubes and understanding that there are people who would paint with that. But I was just a humble student and it was no way I could afford to buy them. Since that time some things changed. I've moved to a great country where I can actually afford being an artist. Now I have the finest oil tubes in my drawer waiting for me every session.
So, what do I like about oils so much?
Oils look fresh and "juicy" (as you would describe it in Russian language) even after they dry;
They are extremely versatile in style - thin or impasto, rough or perfectly smooth, opaque or transparent;
They can be used with a full line of supports to paint on - stretched canvas, canvas boards, primed panels etc.
Yes, oils are the Most Expensive Medium to buy if we are talking about professional Artist's level materials. It becomes more than a hobby - rather an investment. On the other hand, the value of the finished work is much higher in return than with other mediums.
A big special advantage of oils to my mind is that they are proven over centuries. The best works-of-art were created in oils. The Old Masters worked with oils. Think of Leonardo, Michelangelo, Rembrandt, Vermeer, Picasso, Van Gogh and many others. A properly perfomed, varnished and taken care of oil painting will last you for generations and might find a place somewhere in a museum in the year 2300. Isn't that fascinating?! I think it is.
Believe in the power of art.