As am I (artist); and yes, it is a rare thing indeed when art pays the bills (mostly it doesn't).
To the point: not everything put to media (canvas, paper, screen, etc.) is art. Otherwise, someone sneezing into a tissue would then have that framed and with a few other "pieces", go have an art show at their local gallery.
In order to evaluate, you have to have a thought process and have clear means and methods of discerning what appeals to you, what doesn't, why each of these do so, what conventions you embrace, which you don't, and your rationale for those choices.
The younger set are no longer taught how to think, but rather what to think by vapid sources that seek to hold minds in an ignorant embrace. The mechanics are replaced with the desired end result, which is akin to a truly conscious person being able to reply as opposed to a pre-programmed animation like the ones at Disneyland. All they can do is to proclaim what they believe; articulating why they believe it is simply out of their range/ ability.
All of that said: emotion has its' place, but if used as a reason why someone likes something, it falters. Why, some may ask? Because it is merely a reaction to an item, not the core of the matter. Preference is one thign, while emotional reaction is another.