It is a staple.
They go with everything. From casual to formal, black leather jackets are investment pieces that you will wear all the time. That being said, they are definitely items you want to splurge on. I find that there are big differences between faux leather (obviously) and between brands. You get what you pay for.
If you're for the animals and stick to faux leather, then by all means, knock yourself out. I, on the other hand, love myself the feeling of a new lambskin leather jacket. I actually have two leather jackets (Vince, T by Alexander Wang), myself and boy, do I love em'.
Note: I'm not that great at taking care of my possessions. My leather jackets have gone through war, and they still look brand new.
Here are some black leather jackets that are on sale: