My crown doesn't look too bad, but it looks off. What should I do? (Photo)

When you got a Crown is similar like you own teeth but not the same, then your teeth are not straight for that reason you will see the different in form and a little thick.

A single crown on a front tooth can be one of the most difficult things to match in dentistry. Adding to the difficulty is your teeth are not all one color and not all perfectly straight, like you mentioned. The crown has to be a certain thickness, which may be the reason it protrudes further out than your other front tooth. The dentist that did this crown would know if it is possible to "thin it out" a little bit.
One thing that it sounds like you are noticing is that it does not reflect light in the same way your natural teeth are doing. There are different types of crowns and some reflect light better than others. Some materials are more translucent than others. Sometimes a dentist has to work very closely with a lab to do custom shading and layering of ceramic to make it look as natural as possible. However, sometimes a stronger, harder material has to be used if a patient has a strong bite or grinds their teeth. When that is the case, the crown can sometimes turn out to look more opaque. 
There are dentists that will communicate with a dental lab to make a crown be as esthetically pleasing and natural looking as possible. 

Matching one front tooth to the others is very difficult! That being said, I do think it's a bit bulky and should be smaller. The color will be difficult to match.