Where. To. Begin...!? 

Art is not "one size fits all" and everybody has different tastes in colours, subjects and styles.

What is it about a piece that appeals to you?

Perhaps the ambiguity of an abstract piece allows the space to remain neutral or an impressionist piece can bring a subject to attention or a landscape photograph can take your mind elsewhere and create a sense of greater space.

Maybe you just like the colours or the subject.