Loving Krsna is all that matters. Why would I say this? Simple, because Krsna is the only god who says, "When they worship various gods, or even the one without a second, (second to none) they are in fact worshiping Me". What a logical statement and yet no other god makes such claims. They only claim that "THEY" are The One and whoso follows NOT will fail in all things. Only Krishna Vasudeva is the all merciful, the all patient and the all loving lord of creatures.
Of course he comes in many forms like Jesus Christ, Brahma, Buddha or Shiva; but Krishna alone is The All Seeing, All Knowing Father; even He who is watching you and me and every soul at every moment. All other forms are lower forms of the same god, Krsna. Whenever and wherever there is a decay in morality, He comes to restore true righteousness and virtue to the earth. He does the same on all worlds where there is intelligent life. Furthermore all forms serve and worship His Human Form, who is The Original God.
To love Krsna, one merely need repeat his Holy Name, respecting Hare Krsna, (His Highest Form) Rama and Krsna Vasudeva, His best forms on earth in the last ten thousand years. They are best because He comes as He really is and leaves His Followers remembering and loving him forever and ever. Vishnu, Brahma, Shiva, Jesus, Buddha and Sankara are most important among his recent forms on earth. ALL of these teachers taught love and truth. To draw close to Krsna, we must sincerely and deliberately chant his holy names in this manner:
hare rama hare rama
rama rama hare hare
hare krsna hare krsna
krsna krsna hare hare