Is it good to be selfish that way? Wouldn't it be better to trust what ever plan God has will work out for the better
As to my own prayer life I pray very few things for myself these days. I am more concerned with what is out from Him, what is for His sake, what is His Spirit leading me to pray. I might pray something like, "Lord I bring my life to you this morning all that I have, all that I am, all that I do. Make in us what is best for your Son. Do in us what is best for your Son. Bring us through whatever is needed for your Son, Whatever the cost, Whatever we need to go through, Have your way with us precious Lord, that you could have a vessel on this earth that the life of your Son is manifested through, prayed through, lived through. Whatever is for the sake of your Kingdom - your will be done."
Since I note in your profile you are an atheist, I don't know how well you know the Bible if at all, but perhaps you have heard a quote from the Bible that expresses, " Very truly I tell you I will do whatever you ask in my name...You may ask anything in My name and I will do it." ( John 14:13-14 ) What the Lord is saying here is not to think of that as the magic words, the magic formula, and as long as we say In Jesus Name I pray to end our prayers it will be done. The fact is many prayers spoken like that have never been done. He is saying rather when you come to me align your prayers with me, Pray in the Spirit, Pray in me and through me. So, In my name means prayers truly spoken through His Spirit, His life within us. If we touch the heavenly life that way in our prayers then its those prayers that truly have the capacity to touch the world.
The Lord Himself did " Nothing out of His own initiative." while on this earth, but did "Only that which He saw His Father doing." And when He prayed He continually denied Himself anything He would have desired to pray at that moment and prayed rather " Father not my will but your will be done." That is the way I believe He taught us to pray. That is the heart He is after in us in prayer.
As to your question why do Christians pray in the first place? It is a valid question. The Lord is the Lord after all. Why does He need us then to pray? The Short answer is He doesn't, but He has made it so that He does and made it so that He responds when we do. Prayer is one of the great mysteries and disciplines of the Christian faith. It involves entering into something with Him in the Spirit, agreeing with something with Him in the Spirit, being united with Him in something with the Spirit, And when we do that it moves Him, it touches Him, He describes our prayers as a "Fragrant offering" to Him. It is why He gave us a free will. And it is powerful when we exercise it to unite it with His own. No man on earth can probably explain it much beyond that. We even as Christians are told, " We only know in part, and see in part," There is so much even in our own walk we have to take by faith. He promises though one day we will know in full.
I would liken then Christianity and the disciplines of Christianity to say perhaps something in your own life that was difficult for you to understand at first, but something drew you to it to try it out and get involved in it, and as you did you grew in it, you began to see it like you never saw it before, but it took that first step to come to know it like you did, and you were so happy that you pushed through and stepped through that door and and all your questions about it and entered in. For you perhaps it was a course of study you took, a trade, a relationship, travels somewhere, there are probably many things like that in our earthly life that somehow mirror (though dimly) that we have come to know as Christians in the Spiritual journey.
I will pray for you Ken, may God keep drawing you to ask and inquire until one day He draws you in, and then you will see as we do you have entered the door of something very special.