Its good to cry in the presence of your Father!! To tell him that His awesome and for all the things He's done for we know we are not worthy but yet and still he gave the ultimate sacrifice and allows us to come into His presence just to talk to him and he talks back to us! Thats a reason to cry!!
And of course there are several scriptures that say what His response is to our crying or crying out:
Ps 34:17-The righteous cry, and the LORD heareth, and delivereth them out of all their troubles. (KJV)
Ps 55:17-Evening, and morning, and at noon, will I pray, and cry aloud: and he shall hear my voice. (KJV)
Luke 19:40-And he answered and said unto them, I tell you that, if these should hold their peace, the stones would immediately cry out. (KJV)
Ps 56:9-When I cry unto thee, then shall mine enemies turn back: this I know; for God is for me. (KJV)
Ps 57:2-I will cry unto God most high; unto God that performeth all things for me. (KJV)
Rom 8:15-For ye have not received the spirit of bondage again to fear; but ye have received the Spirit of adoption, whereby we cry, Abba, Father. (KJV)