New Amazons

[Zephyr]

My new Amazon tree boas arrived yesterday. They're perfect feeders, but dull colours. They were the breeder's cheapest pair. I'm new to keeping Amazons, actually I'm new to keeping any boas at all. The male is a year and a half old, the female is only a few months old. Is it normal for the male to actually chase me across a room?? I'll take him out after receiving many bites, and if i put him down he lunges after me and will actually follow me around the house striking. :S he's still small enough that it doesn't hurt much, but do amazons calm down with handling or are they naturally a very agressive snake?
Thanks