@Anjani, Mahakali is my favourite. Once someone asked Ramkrishna Paramhansa, which method of meditation do you follow? Rajayoga or...
He answered, I just close my eyes, do her japa, get lost in her Dhyana. I am really not aware of what type of meditaion it is, but this is how I connect to my Ma. This was the power of his devotion.
He once asked his diciples, why do you worship Ma Kali? One of them answered, when we are in trouble we come running to you. But when you have problem, whom do you look for solution? Ma Kali, that's why we worship her.