Sprinkling and pouring are represented in scripture. I personally like the symbolism of pouring. They aren't as you say traditions from some churches. They're actually the most common form of baptism in the history of the Church.
The history of RCC, and several reformation denominations. Not generally Baptists, Pentecostals and other churches that go by the bible over tradition.
What does sprinkling and pouring picture? How does that symbolise Jesus' death, burial and resurrection? It doesn't.
Anyway .. I will agree to disagree.