Finding the perfect chandelier can be a difficult task as your choice of lighting should be a focal point of your decor while being functional as well.
I find that my clients are always very forthcoming about the type of light fixtures they want. However, it can be difficult for them to consider the bigger picture, like it’s impact on the rest of the room and how the fixture they desire is not always the perfect fit for the space.
There is so much to consider when selecting one or more light fixtures.
You first have to consider how many light fixtures will be seen together. With the popular open floor plan, the foyer light can be seen along with the dining room light, which can be seen with the kitchen island pendants, which can be seen with the breakfast light fixture.
All of these fixtures should work well together. You do not want all of them to have a strong personality. When this scenario happens, I tend to go with a simpler and cleaner look with the foyer fixture and the kitchen island pendants, while allowing the dining room and breakfast room fixtures more character.

You want to consider the theme of your home. Are you more traditional or modern? Are you coastal or farmhouse? Consider your theme and how your light fixtures can help you achieve this look.
Do not worry about mixing metals. There is already so much metal in a home. From door hardware and hinges, to light fixtures, to cabinet hardware, kitchen appliances and plumbing fixtures, and there are so many metallic finishes available that adding more metal is not going to matter much in the big picture. It is hard to get a solid match on all of this, so I always recommend mixing metals and allowing one to pop from another.
Consider the light value of your light fixture. Do you need light to illuminate out from the fixture? You might consider a chandelier with arms that will distribute light around the room.

Do you need light to be concentrated on one area? Maybe consider a light that is more enclosed.

Maybe you have a tall foyer or staircase and you need to illuminate light at different levels to light up the space above and below.

Lighting can really add a great detail to any room. Always consider your options and think of your fixtures as you do with accessories or jewelry that people wear to dress up an outfit.