I got 'christened' as a baby, by the C of E, because my parents thought it was the right thing to do. I had no say in it. It didn't change anything in me (or them!). However, when I came to faith for myself, I was 17 and attending a house church. I chose to be baptized because I wanted to make a public statement of my new faith.
That is what baptism is - a public statement that you identify yourself with the death (going into the water) and resurrection (coming up again!) of Jesus. What it symbolises is profound, but in and of itself it is a very simple act. It reflects, rather than causes, a change in the spirit of the new believer.
I am all for parents of babies wanting to give thanks to God for their safe arrival and praying that the Lord will look after them and help them to grow up to believe. But there is absolutely no necessity for there to be water involved in this process. God hears our prayers without us having to ritualise them and the fact that a child has been sprinkled with water that has had a priest's hands waved over it will make absolutely zero difference to that child's life, there and then and for the rest of his (or her) life.
I don't believe in half the mystical stuff that the 'high church' (Roman and a lot of Anglicans) add to it - nobody is ever recorded blessing or sanctifying baptismal water in the New Testament, and so far as I can see nobody was baptised by having water drizzled on their forehead either. You will also find no explicit reference to any infant being baptized - only a couple of places where you can infer that it might (just possibly) have happened, and even then I don't see that as a natural reading of the passage unless you already believe in infant baptism and want to try to prove it's right. It's also good to remember that all those references are in the book of Acts, which is primarily a history text, not a theological one (i.e. it tells you what happened, but not necessarily why, or whether it was a good thing). The acts in Acts can only be properly understood and used for teaching and doctrine when read alongside the gospels and the epistles, and in their entirety, only individuals professing faith are baptised.
In John 3 where Jesus speaks of water and the Spirit, the full context of his conversation with Nicodemus clearly suggests that being 'born of water' means natural birth of a human mother*, not water baptism, so I don't think it right to make that passage into evidence that water baptism is required for entrance to the Kingdom. Besides, if you go down that route, you end up tying yourself in tricky theological knots when it comes to things like death-bed conversion. It's wise to remember that God, having gone to extreme lengths to get us saved by sending his own son to die, is clearly more interested in making the way open for us to join him in eternity, than in making rules to stop us.
It's also worth remembering that right back at the start of the Reformation, a group of believers earned the scornful title 'Anabaptists' (re-baptisers) because they started baptising new belivers who had previously been members of the Roman church (and therefore already baptised as infants). These people realised that institutional, cultural Christianity is not the same thing as the real, life-giving relationship that Jesus died to bring us. When they started on that life for real, for the first time, they quite rightly employed baptism as a public statement of their commitment and belief. The Anabaptist movement, of course, eventually became today's Baptist church.
*New Testament teaching about the Kingdom is more about the relationship we will have with God and each other than it is about an actual place - 'born of water' shows that the fulness of this Kingdom is uniquely for us, not the Angels, and 'born of the Spirit' shows that it is only for us who are saved.