Facebook is a great social media platform. If you are going to use it, you should use it in conjunction with something else, like a real website. It resizes photos in a weird way from everything I understand, and it often adds noise to them when none is visible in any other setting where you are viewing the same photo at the same size. If you are going to use it, you’ll have to resize things yourself before uploading them, which is probably a lot of work.
The best thing about it is when you do photos for a business of any type (a store, a band, an event) – you can tag the people involved in them (or they can tag themselves) and you get an instant connection where people know who did the work and who to talk to if they want something similar – it’s free advertising. But if you’re only doing it through Facebook, you’re not going to look too pro.