No it isn't advisable to paint brick. You are taking a maintenance free product and turning it into a product you have to re-paint every 5-10 years. Brick needs to breath and takes a special paint. Also in areas with basement people paint their homes to hide a bad foundation. Personally I would never buy a painted brick house. Now, you can stain brick to change the color.

If you can AVOID painting the brick, it is highly advisable. Painting brick traps in the moisture, causing the paint to prematurely peel and bubble. Albeit they do have products that are supposed to extend the life of the finish, but there is never a guarantee - turning a low to no maintenance siding option into one that will commonly require maintenance. The main reason for not painting brick (if you are in an area that has a freeze thaw cycle) is it may cause deterioration of the actual brick as ice can microscopically break apart the brick and mortar. We often times try to steer our clients in the direction of changing all the other elements around it like below - the client was convinced there was no other option.

Are you wanting to paint it to help sell it?

If you post photos maybe we can give you some other ideas that would help with the curb appeal rather than painting it. I wouldn't paint it either for the same and other reasons the others have mentioned.