Philosophy has skipped right past the new birth. It has no choice but to do so. It is man's wisdom and the wisdom of God is foolishness in its eyes. Philosophy must ask such questions: Are all Christians expected to have a "positively meaningful and reciprocal conscious relationship" with God?, because, through philosophy, it cannot be Known.
Being that a Christian is one who has been born again, who has gone from a state of spiritual deadness to a condition of spiritual life by the propitiatory covering of the blood of the Son of God and, being that such a one is indwelt by the very Spirit of the living God from that moment on, I would say that the answer is "of course, if God exists and the Gospel is true".
There are those who have actually received Him, actually been forgiven, actually been given the Holy Spirit (whereby they cry "Abba"), actually been predestined to conformity to Christ, actually been given eternal life. They struggle against the world, the flesh, and the devil and yet they are able to say:
for I know whom I have believed, and am persuaded that he is able to keep that which I have committed unto him against that day. - 2 Timothy 1:12b
Not only do they know about Him but they know Him; Father, Son, and Holy Spirit. Christianity is a positively meaningful conscious relationship with God. Christianity is not a religion, it is a relationship.
And what agreement hath the temple of God with idols? for ye are the temple of the living God; as God hath said, I will dwell in them, and walk in them; and I will be their God, and they shall be my people. Wherefore come out from among them, and be ye separate, saith the Lord, and touch not the unclean thing; and I will receive you,
And will be a Father unto you, and ye shall be my sons and daughters, saith the Lord Almighty. - 2 Corinthians 6:16-18
The question asks after a "positively meaningful and reciprocal conscious relationship" with God. Looking at a definition of reciprocal I would say the word should be understood in the first sense only and never intimating equality:
- given, felt, or done in return.
- (of an agreement or obligation) bearing on or binding each of two parties equally.
A Christian is, both individually and corporately, the temple of the living God wherein He dwells ... actually. A Christian is possessed of the power to become a child of God and God will complete the good work that He began in them. Of course there is a positively meaningful conscious relationship.
As for reciprocal, well, He is God and we are not.
Two additional bullet points were added: How is God expected to talk back? and How is God expected to intervene in reality? I will briefly respond to the second as "God talking back" surely represents an intervention into reality since creation itself is considered as speech.
God, who at sundry times and in divers manners spake in time past unto the fathers by the prophets, Hath in these last days spoken unto us by his Son, whom he hath appointed heir of all things, by whom also he made the worlds;
Who being the brightness of his glory, and the express image of his person, and upholding all things by the word of his power, when he had by himself purged our sins, sat down on the right hand of the Majesty on high; - Hebrews 1:1-3
I would not wish to put God in a box as to the manner of God's intervention in the life of a person, that is the bailiwick of denominations and theological schools. Just as Jesus, while on earth, never contradicted what had been written but rather illuminated it unto men, so anything communicated personally by God through the Spirit will never contradict what has been written. If the Old Testament testifies of Jesus (John 5:39) and the New Testament is His revelation then any further intervention/communication will be in harmony with what has been written about Christ and point to Him..
Many antichrists are in the world pointing here and there and not every spirit is from God. There are many who espouse secret knowledge and special revelation which supersedes or corrects or interprets what has been written. Some of them are very old and some relatively new. Some point to "mysteries", relics, and special rites or visitations. The test for all is simply this:
Hereby know ye the Spirit of God: Every spirit that confesseth that Jesus Christ is come in the flesh is of God: And every spirit that confesseth not that Jesus Christ is come in the flesh is not of God: and this is that spirit of antichrist, whereof ye have heard that it should come; and even now already is it in the world. Ye are of God, little children, and have overcome them: because greater is he that is in you, than he that is in the world. - 1 John 4:2-4
And the expected outfall of this good confession that Jesus is the Son of God makes up God's ultimate intervention into reality; His love shed abroad in our hearts (Romans 5:5).
Beloved, let us love one another: for love is of God; and every one that loveth is born of God, and knoweth God. He that loveth not knoweth not God; for God is love. In this was manifested the love of God toward us, because that God sent his only begotten Son into the world, that we might live through him. Herein is love, not that we loved God, but that he loved us, and sent his Son to be the propitiation for our sins. Beloved, if God so loved us, we ought also to love one another. No man hath seen God at any time. If we love one another, God dwelleth in us, and his love is perfected in us. Hereby know we that we dwell in him, and he in us, because he hath given us of his Spirit. And we have seen and do testify that the Father sent the Son to be the Saviour of the world. Whosoever shall confess that Jesus is the Son of God, God dwelleth in him, and he in God. And we have known and believed the love that God hath to us. God is love; and he that dwelleth in love dwelleth in God, and God in him. - 1 John 4:7-16