My parents were in stealth mode and managed to stack all of our Santa presents at the foot of our bed one year. I woke up and saw them and almost peed my pants, lol, I was so excited.
Or maybe when my two younger brothers were 3 and 5..old enough to enjoy their presents, Santa and the whole experience. With their wildly curly hair, fleece footie pajamas and excited, crooked grins, they were adorable and in love with every single present they opened. I remember them sitting in a pile of wrapping paper, showing each other their stuff lol.
I have too many awesome Christmas memories to narrow down, but those are my top 2 lol..