Lord Ganesha is considered the master of intellect and wisdom. He is an unmistakable part of every Hindu household in Mumbai. Here's an interesting tidbit.
If you choose to gift an idol or a picture of lord Ganesha to your Indian friend, then make sure that his truck in NOT turned to the right side. Ganesh with his truck turned to the right is considered Strict and Awakened. A household with such an idol is expected to follow strict religious protocols. A gift with right side trunk may be politely turned down or end up returned to the seas.