“In whatever transcendental mellow My devotee worships Me, I reciprocate with him. That is My natural behavior. (Sri Caitanya-caritamrta Adi-lila 4.19)
…The Lord, by His inherent nature, reveals Himself before His devotees according to their inherent devotional service. The Vṛndāvana pastimes demonstrated that although generally people worship God with reverence, the Lord is more pleased when a devotee thinks of Him as his pet son, personal friend or most dear fiance and renders service unto Him with such natural affection. The Lord becomes a subordinate object of love in such transcendental relationships. (from purport)
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The Hare Krishna Movement 