Never be afraid to buy art because you don't know if it is "good" or not. Buy it because it speaks to you and it works in your space. The neat thing about art that you picked out yourself is that you will remember pretty much everything about the transaction and the story you know about it once you own it. I often hesitate to tell buyers the whole story behind a piece because so often art will speak to different people in different ways, and perhaps what I think about when I paint is not at all the reason someone else stopped to take a look. Currently I have a piece on view that about 50% of the viewers say is a bird and 50% say is a person. I am good with either, and next time I am painting it the other way! The point is, we see what we think of, and that is all that really matters once it is in your home. That said, i still love to hear the artists' stories because i take my personal reaction, plus their motivation to paint, and come up with a sort of "whole" to each piece I buy. (yes, I buy other artists work - the great thing about being in art school is catching new works before anyone else see them.)
Bottom line: Every time you walk by that piece of art you chose and hung, you will smile - if you buy works you truly love and not works that someone else told you to buy. (Buying works someone else chose for you is an investment, and that is also a fun/good thing to do, but it is different than buying pieces you love and you want to live with.)
Art is a highly personal choice; if you chose art you enjoy looking at, it becomes a part of your soul. Happy hunting!