While painting your home's brick exterior sounds like a great way to give it a refreshed look, there are several drawbacks to doing so, including the need to maintain it.
The exterior of a home is exposed to the elements, so paint will quickly get dirty and chipped. You'll need to keep cleaning it, creating a lot of work for yourself.
Chipping will happen more often than you may realize, and you can also expect to have to repaint the home whenever the color fades, which could be as often as every few years.
Instead of painting, have the brick cleaned well or try brick staining. Alternatively, you could use a brick coating, like Rhino Shield, that looks like paint but repels water.